diff --git a/mauka/CMakeLists.txt b/mauka/CMakeLists.txt
index b915bad2..0f85f305 100644
--- a/mauka/CMakeLists.txt
+++ b/mauka/CMakeLists.txt
@@ -42,6 +42,8 @@ ENDFOREACH(PATH)
 SET(QT_USE_QTXML "true")
 
 FIND_PACKAGE(Qt4 REQUIRED) # find and setup Qt4 for this project
+FIND_PACKAGE(PythonLibs REQUIRED)
+FIND_PACKAGE(PythonSitePackages REQUIRED)
 FIND_PACKAGE(VLSISAPD REQUIRED)
 FIND_PACKAGE(HURRICANE REQUIRED)
 FIND_PACKAGE(CORIOLIS REQUIRED)
@@ -49,6 +51,14 @@ FIND_PACKAGE(NIMBUS REQUIRED)
 FIND_PACKAGE(METIS REQUIRED)
 
 SET_LIB_LINK_MODE()
+SET(Boost_USE_STATIC_LIBS ON)
+MESSAGE(STATUS "Always uses Boost static libraries.")
+FIND_PACKAGE(Boost 1.35.0 COMPONENTS program_options filesystem system regex python)
+IF(NOT Boost_FOUND)
+  FIND_PACKAGE(Boost 1.33.1 COMPONENTS program_options filesystem python regex REQUIRED)
+ENDIF(NOT Boost_FOUND)
+MESSAGE(STATUS "Found Boost libraries ${Boost_LIB_VERSION} in ${Boost_INCLUDE_DIR}")
+MESSAGE(STATUS "  ${Boost_LIBRARIES}")
 
 ADD_SUBDIRECTORY(src)
 ADD_SUBDIRECTORY(cmake_modules)
diff --git a/mauka/src/BBPlacer.cpp b/mauka/src/BBPlacer.cpp
index 241ec8b1..3dafbfa6 100644
--- a/mauka/src/BBPlacer.cpp
+++ b/mauka/src/BBPlacer.cpp
@@ -89,133 +89,6 @@ namespace {
   using namespace CRL;
 
 
-  class RowFeed {
-    public:
-                        RowFeed           ( MaukaEngine*, const Box& bb );
-      inline const Box& getBox            () const;
-             void       mergeInstanceSpan ( DbU::Unit source, DbU::Unit target );
-             void       insertTieChunk    ( DbU::Unit  xmin
-                                          , DbU::Unit  xmax
-                                          , DbU::Unit  y
-                                          , const Transformation::Orientation& );
-             void       insertFeeds       ( Cell*, const Transformation::Orientation& );
-    private:
-      MaukaEngine*   _mauka;
-      Box            _boundingBox;
-      list<Interval> _instanceSpans;
-  };
-
-
-  RowFeed::RowFeed ( MaukaEngine* mauka, const Box& bb )
-    : _mauka        (mauka)
-    , _boundingBox  (bb)
-    , _instanceSpans()
-  { }
-
-
-  inline const Box& RowFeed::getBox () const { return _boundingBox; }
-
-
-  void  RowFeed::mergeInstanceSpan ( DbU::Unit source, DbU::Unit target )
-  {
-    Interval spanMerge ( source, target );
-
-    list<Interval>::iterator imerge = _instanceSpans.end();
-    list<Interval>::iterator ispan  = _instanceSpans.begin();
-
-    while ( ispan != _instanceSpans.end() ) {
-      if ( spanMerge.getVMax() < (*ispan).getVMin() ) break;
-
-      if ( spanMerge.intersect(*ispan) ) {
-        if ( imerge == _instanceSpans.end() ) {
-          imerge = ispan;
-          (*imerge).merge ( spanMerge );
-        } else {
-          (*imerge).merge ( *ispan );
-          ispan = _instanceSpans.erase ( ispan );
-          continue;
-        }
-      }
-      ispan++;
-    }
-
-    if ( imerge == _instanceSpans.end() ) {
-      _instanceSpans.insert ( ispan, spanMerge );
-    }
-  }
-
-
-  void  RowFeed::insertTieChunk ( DbU::Unit xmin
-                                , DbU::Unit xmax
-                                , DbU::Unit y
-                                , const Transformation::Orientation& orientation )
-  {
-    Cell* feed = _mauka->getFeedCells().getBiggestFeed();
-    if ( feed == NULL ) {
-      cerr << Error("No feed has been registered, ignoring.") << endl;
-    }
-
-    DbU::Unit feedWidth = feed->getAbutmentBox().getWidth();
-    DbU::Unit xtie      = xmin;
-
-    while ( true ) {
-      if ( xtie           >= xmax ) break;
-      if ( xtie+feedWidth >  xmax ) {
-      // Feed is too big, try to find a smaller one.
-        int pitch = (int)((xmax-xtie) / _mauka->getPitch());
-        for ( ; pitch > 0 ; --pitch ) {
-          feed      = _mauka->getFeedCells().getFeed ( pitch );
-          feedWidth = feed->getAbutmentBox().getWidth();
-          if ( feed != NULL ) break;
-        }
-        if ( feed == NULL ) break;
-      }
-
-      // cerr << "Inserted " << feed
-      //      << " " << insName.str() << " @" << DbU::getLambda(xtie)
-      //      << "," << DbU::getLambda(y)
-      //      << " in " << _mauka->getCell() << endl;
-
-      Instance::create ( _mauka->getCell()
-                       , _mauka->getFeedCells().getNewFeedName().c_str()
-                       , feed
-                       , getTransformation(feed->getAbutmentBox(),xtie,y,orientation)
-                       , Instance::PlacementStatus::PLACED
-                       );
-
-      xtie += feedWidth;
-    }
-  }
-
-
-  void  RowFeed::insertFeeds ( Cell* cell, const Transformation::Orientation& orientation )
-  {
-    list<Interval>::iterator ispan  = _instanceSpans.begin();
-    
-    DbU::Unit minFeed = _boundingBox.getXMin();
-    DbU::Unit maxFeed;
-    if ( ispan == _instanceSpans.end() ) {
-      maxFeed = _boundingBox.getXMax();
-      insertTieChunk ( minFeed, maxFeed, _boundingBox.getYMin(), orientation );
-      return;
-    }
-
-    maxFeed = (*ispan).getVMin();
-    insertTieChunk ( minFeed, maxFeed, _boundingBox.getYMin(), orientation );
-
-    while ( ispan != _instanceSpans.end() ) {
-      minFeed = (*ispan).getVMax();
-
-      if ( ++ispan != _instanceSpans.end() )
-        maxFeed = (*ispan).getVMin();
-      else
-        maxFeed = _boundingBox.getXMax();
-
-      insertTieChunk ( minFeed, maxFeed, _boundingBox.getYMin(), orientation );
-    }
-  }
-
-
 class CompareInstancePosition
 {
     private: BBPlacer* _bbPlacer;
@@ -358,8 +231,6 @@ BBPlacer::BBPlacer(MaukaEngine* mauka)
 
 void BBPlacer::Save()
 {
-    bool insertFeeds = _mauka->doInsertFeeds();
-
     UpdateSession::open();
     
     bool autoMaterialize = not Go::autoMaterializationIsDisabled();
@@ -368,7 +239,6 @@ void BBPlacer::Save()
     for (unsigned i = 0; i < _subRowInstances.size(); i++)
     {
         SubRow* subRow = _subRowVector[i];
-        RowFeed rowFeed ( _mauka, subRow->getBox() );
 
         Transformation::Orientation orientation
           = (subRow->getRow()->getOrientation()) ? Transformation::Orientation::MY
@@ -382,9 +252,6 @@ void BBPlacer::Save()
             Occurrence instanceOccurrence = _mauka->_instanceOccurrencesVector[instanceId];
             Instance* instance = static_cast<Instance*>(instanceOccurrence.getEntity());
 
-            if ( insertFeeds )
-              rowFeed.mergeInstanceSpan ( x, x+instance->getAbutmentBox().getWidth() );
-
             Box masterABox = instance->getMasterCell()->getAbutmentBox();
             Transformation instanceTransformation = getTransformation(masterABox, x, y, orientation);
 
@@ -400,8 +267,6 @@ void BBPlacer::Save()
             instance->setPlacementStatus(Instance::PlacementStatus::PLACED);
             //setPlacementStatusRecursivelyToPlaced(instance);
         }
-        if ( insertFeeds )
-          rowFeed.insertFeeds ( _mauka->getCell(), orientation );
     }
 
     if ( autoMaterialize ) Go::enableAutoMaterialization ();
diff --git a/mauka/src/CMakeLists.txt b/mauka/src/CMakeLists.txt
index 299e4905..dd658a91 100644
--- a/mauka/src/CMakeLists.txt
+++ b/mauka/src/CMakeLists.txt
@@ -5,6 +5,7 @@
                          ${CORIOLIS_INCLUDE_DIR} 
                          ${HURRICANE_INCLUDE_DIR} 
                          ${CONFIGURATION_INCLUDE_DIR} 
+                         ${PYTHON_INCLUDE_PATH}
                        )
                    set ( includes      mauka/Configuration.h
                                        mauka/FeedCells.h
@@ -20,6 +21,7 @@
                                        mauka/MaukaEngine.h
                        )
 		   set ( mocIncludes   mauka/GraphicMaukaEngine.h )
+                   set ( pyIncludes    mauka/PyMaukaEngine.h )
                    set ( cpps          Configuration.cpp
                                        BBPlacer.cpp
                                        FeedCells.cpp
@@ -31,12 +33,40 @@
                                        SimAnnealingPlacer.cpp
                                        SubRow.cpp
                                        Surface.cpp
+                                       InsertFeeds.cpp
                                        MaukaEngine.cpp
                                        GraphicMaukaEngine.cpp
                        )
+                   set ( pyCpps        PyMauka.cpp
+                                       PyMaukaEngine.cpp
+                       )
           qt4_wrap_cpp ( mocCpps       ${mocIncludes} )
 
 
-           add_library ( mauka         ${cpps} ${mocCpps} )
-               install ( TARGETS       mauka                      DESTINATION lib${LIB_SUFFIX} )
-               install ( FILES         ${includes} ${mocIncludes} DESTINATION include/coriolis2/mauka ) 
+           add_library ( mauka         ${cpps} ${mocCpps} ${pyCpps} )
+ target_link_libraries ( mauka         ${METIS_LIBRARIES}
+                                       ${NIMBUS_LIBRARIES}
+                                       ${HURRICANE_PYTHON_LIBRARIES}
+                                       ${HURRICANE_GRAPHICAL_LIBRARIES}
+                                       ${HURRICANE_LIBRARIES}
+                                       ${CONFIGURATION_LIBRARY}
+                                       ${CIF_LIBRARY}
+                                       ${AGDS_LIBRARY}
+                                       ${LEFDEF_LIBRARIES}
+                                       ${OA_LIBRARIES}
+                                       ${QT_LIBRARIES}
+                                       ${Boost_LIBRARIES}
+                                       ${LIBXML2_LIBRARIES}
+                                       ${PYTHON_LIBRARIES} -lutil
+                       )
+
+           add_library ( Mauka         MODULE ${pyCpps} )
+ set_target_properties ( Mauka         PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} -D__PYTHON_MODULE__=1"
+                                       PREFIX ""
+                       )
+
+               install ( TARGETS       mauka           DESTINATION lib${LIB_SUFFIX} )
+               install ( TARGETS       Mauka           DESTINATION ${PYTHON_SITE_PACKAGES} )
+               install ( FILES         ${includes}
+                                       ${mocIncludes}
+                                       ${pyIncludes}   DESTINATION include/coriolis2/mauka ) 
diff --git a/mauka/src/InsertFeeds.cpp b/mauka/src/InsertFeeds.cpp
new file mode 100644
index 00000000..452621bf
--- /dev/null
+++ b/mauka/src/InsertFeeds.cpp
@@ -0,0 +1,337 @@
+
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) UPMC/LIP6 2008-2010, All Rights Reserved
+//
+// ===================================================================
+//
+// $Id$
+//
+// x-----------------------------------------------------------------x
+// |                                                                 |
+// |                   C O R I O L I S                               |
+// |              M a u k a  -  P l a c e r                          |
+// |                                                                 |
+// |  Author      :                    Jean-Paul CHAPUT              |
+// |  E-mail      :       Jean-Paul.Chaput@asim.lip6.fr              |
+// | =============================================================== |
+// |  C++ Module  :       "./InsertFeeds.cpp"                        |
+// | *************************************************************** |
+// |  U p d a t e s                                                  |
+// |                                                                 |
+// x-----------------------------------------------------------------x
+
+
+#include  "hurricane/UpdateSession.h"
+#include  "crlcore/ToolBox.h"
+#include  "mauka/MaukaEngine.h"
+
+
+namespace {
+
+  using namespace std;
+  using namespace Mauka;
+  using namespace Hurricane;
+  using namespace CRL;
+
+
+// -------------------------------------------------------------------
+// Class  :  "::RowFeed"
+
+  class SurfaceFeeds;
+
+
+  class RowFeed {
+    public:
+                           RowFeed           ( SurfaceFeeds*, const Box& bb );
+      inline const Box&    getBox            () const;
+      inline SurfaceFeeds* getSurfaceFeeds   ();
+      inline MaukaEngine*  getMauka          ();
+      inline void          setOrientation    ( Transformation::Orientation );
+             void          mergeInstanceSpan ( DbU::Unit source, DbU::Unit target );
+             void          insertTieChunk    ( DbU::Unit  xmin
+                                             , DbU::Unit  xmax
+                                             , DbU::Unit  y
+                                             , const Transformation::Orientation& );
+             void          insertFeeds       ();
+    private:
+      SurfaceFeeds*                _surface;
+      Box                          _boundingBox;
+      Transformation::Orientation  _orientation;
+      list<Interval>               _instanceSpans;
+  };
+
+
+// -------------------------------------------------------------------
+// Class  :  "::SurfaceFeeds"
+
+
+  class SurfaceFeeds {
+    public:
+                           SurfaceFeeds          ( MaukaEngine* );
+                          ~SurfaceFeeds          ();
+      inline MaukaEngine*  getMauka              ();
+             void          addInstanceOccurrence ( Occurrence );
+             void          insertFeeds           ();
+    private:
+             void          _orientRows           ( Transformation::Orientation );
+    private:
+      MaukaEngine*      _mauka;
+      Box               _area;
+      vector<RowFeed*>  _rowFeeds;
+      bool              _oriented;
+  };
+
+
+// -------------------------------------------------------------------
+// Class Implantation  :  "::RowFeed"
+
+
+  RowFeed::RowFeed ( SurfaceFeeds* surface, const Box& bb )
+    : _surface      (surface)
+    , _boundingBox  (bb)
+    , _orientation  (Transformation::Orientation::ID)
+    , _instanceSpans()
+  { }
+
+
+  inline const Box&   RowFeed::getBox   () const { return _boundingBox; }
+  inline MaukaEngine* RowFeed::getMauka () { return _surface->getMauka(); }
+
+  inline void  RowFeed::setOrientation ( Transformation::Orientation orientation )
+  { _orientation = orientation; }
+
+
+  void  RowFeed::mergeInstanceSpan ( DbU::Unit source, DbU::Unit target )
+  {
+    Interval spanMerge ( source, target );
+
+    list<Interval>::iterator imerge = _instanceSpans.end();
+    list<Interval>::iterator ispan  = _instanceSpans.begin();
+
+    while ( ispan != _instanceSpans.end() ) {
+      if ( spanMerge.getVMax() < (*ispan).getVMin() ) break;
+
+      if ( spanMerge.intersect(*ispan) ) {
+        if ( imerge == _instanceSpans.end() ) {
+          imerge = ispan;
+          (*imerge).merge ( spanMerge );
+        } else {
+          (*imerge).merge ( *ispan );
+          ispan = _instanceSpans.erase ( ispan );
+          continue;
+        }
+      }
+      ispan++;
+    }
+
+    if ( imerge == _instanceSpans.end() ) {
+      _instanceSpans.insert ( ispan, spanMerge );
+    }
+  }
+
+
+  void  RowFeed::insertTieChunk ( DbU::Unit xmin
+                                , DbU::Unit xmax
+                                , DbU::Unit y
+                                , const Transformation::Orientation& orientation )
+  {
+    Cell* feed = getMauka()->getFeedCells().getBiggestFeed();
+    if ( feed == NULL ) {
+      cerr << Error("No feed has been registered, ignoring.") << endl;
+    }
+
+    DbU::Unit feedWidth = feed->getAbutmentBox().getWidth();
+    DbU::Unit xtie      = xmin;
+
+    while ( true ) {
+      if ( xtie           >= xmax ) break;
+      if ( xtie+feedWidth >  xmax ) {
+      // Feed is too big, try to find a smaller one.
+        int pitch = (int)((xmax-xtie) / getMauka()->getPitch());
+        for ( ; pitch > 0 ; --pitch ) {
+          feed      = getMauka()->getFeedCells().getFeed ( pitch );
+          feedWidth = feed->getAbutmentBox().getWidth();
+          if ( feed != NULL ) break;
+        }
+        if ( feed == NULL ) break;
+      }
+
+      Instance::create ( getMauka()->getCell()
+                       , getMauka()->getFeedCells().getNewFeedName().c_str()
+                       , feed
+                       , getTransformation(feed->getAbutmentBox(),xtie,y,orientation)
+                       , Instance::PlacementStatus::PLACED
+                       );
+
+      xtie += feedWidth;
+    }
+  }
+
+
+  void  RowFeed::insertFeeds ()
+  {
+    list<Interval>::iterator ispan  = _instanceSpans.begin();
+    
+    DbU::Unit minFeed = _boundingBox.getXMin();
+    DbU::Unit maxFeed;
+    if ( ispan == _instanceSpans.end() ) {
+      maxFeed = _boundingBox.getXMax();
+      insertTieChunk ( minFeed, maxFeed, _boundingBox.getYMin(), _orientation );
+      return;
+    }
+
+    maxFeed = (*ispan).getVMin();
+    insertTieChunk ( minFeed, maxFeed, _boundingBox.getYMin(), _orientation );
+
+    while ( ispan != _instanceSpans.end() ) {
+      minFeed = (*ispan).getVMax();
+
+      if ( ++ispan != _instanceSpans.end() )
+        maxFeed = (*ispan).getVMin();
+      else
+        maxFeed = _boundingBox.getXMax();
+
+      insertTieChunk ( minFeed, maxFeed, _boundingBox.getYMin(), _orientation );
+    }
+  }
+
+
+// -------------------------------------------------------------------
+// Class Implantation  :  "::SurfaceFeeds"
+
+
+  SurfaceFeeds::SurfaceFeeds ( MaukaEngine* mauka )
+    : _mauka   (mauka)
+    , _area    (mauka->getCell()->getAbutmentBox())
+    , _rowFeeds()
+    , _oriented(false)
+  {
+    DbU::Unit sliceHeight = _mauka->getSliceHeight();
+    size_t    rowsNb      = _area.getHeight() / sliceHeight;
+
+    _rowFeeds.reserve ( rowsNb );
+    for ( size_t irow=0 ; irow<rowsNb ; ++irow )
+      _rowFeeds.push_back ( new RowFeed(this,Box(_area.getXMin()
+                                                , irow    * sliceHeight
+                                                ,_area.getXMax()
+                                                ,(irow+1) * sliceHeight )) );
+  }
+
+
+  SurfaceFeeds::~SurfaceFeeds ()
+  {
+    for ( size_t irow=0 ; irow<_rowFeeds.size() ; ++irow )
+      delete _rowFeeds[irow];
+  }
+
+
+  inline MaukaEngine* SurfaceFeeds::getMauka () { return _mauka; }
+
+
+  void  SurfaceFeeds::addInstanceOccurrence ( Occurrence occurrence )
+  {
+    Instance* instance = dynamic_cast<Instance*>(occurrence.getEntity());
+    if ( instance == NULL ) {
+      cerr << Error("Entity of occurrence %s is not an instance."
+                   ,getString(occurrence).c_str()) << endl;
+      return;
+    }
+
+    DbU::Unit      sliceHeight    = _mauka->getSliceHeight();
+    Box            masterABox     = instance->getAbutmentBox();
+    Transformation transformation = occurrence.getPath().getTransformation();
+
+    transformation.applyOn(masterABox);
+    Transformation::Orientation orientation = occurrence.getPath().getTransformation().getOrientation();
+    int rowStart = (masterABox.getYMin() - _area.getYMin()) / sliceHeight;
+    int rowStop  = (masterABox.getYMax() - _area.getYMin()) / sliceHeight;
+
+    if ( (rowStart < 0) or (rowStop > (int)_rowFeeds.size()) ) {
+      cerr << Error("Instance %s (AB:%s) is outside the placement area."
+                   ,getString(occurrence).c_str()
+                   ,getString(masterABox).c_str()
+                   ) << endl;
+      return;
+    }
+
+    if ( not _oriented ) {
+      size_t instanceRowMY = 0;
+      switch ( orientation ) {
+        case Transformation::Orientation::ID: instanceRowMY = 0; break;
+        default:
+        case Transformation::Orientation::MY: instanceRowMY = 1; break;
+      }
+      
+      Transformation::Orientation rowZeroOrientation = Transformation::Orientation::ID;
+      switch ( (rowStart+instanceRowMY) % 2 ) {
+        case 0: orientation = Transformation::Orientation::ID; break;
+        case 1: orientation = Transformation::Orientation::MY; break;
+      }
+
+      _orientRows ( rowZeroOrientation );
+    }
+
+    for ( size_t irow = rowStart ; (int)irow<rowStop ; ++irow ) {
+      _rowFeeds[irow]->mergeInstanceSpan ( masterABox.getXMin(), masterABox.getXMax() );
+    }
+  }
+
+
+  void  SurfaceFeeds::insertFeeds ()
+  {
+    for ( size_t irow=0 ; irow<_rowFeeds.size() ; ++irow )
+      _rowFeeds[irow]->insertFeeds ();
+  }
+
+
+  void  SurfaceFeeds::_orientRows ( Transformation::Orientation rowZeroOrientation )
+  {
+    if ( _oriented ) return;
+    _oriented = true;
+
+    size_t rowZeroMY = 0;
+    switch ( rowZeroOrientation ) {
+      case Transformation::Orientation::ID: rowZeroMY = 0; break;
+      default:
+      case Transformation::Orientation::MY: rowZeroMY = 1; break;
+    }
+
+    for ( size_t irow=0 ; irow<_rowFeeds.size() ; ++irow ) {
+      Transformation::Orientation orientation = Transformation::Orientation::ID;
+      switch ( (irow+rowZeroMY) % 2 ) {
+        case 0: orientation = Transformation::Orientation::ID; break;
+        case 1: orientation = Transformation::Orientation::MY; break;
+      }
+
+      _rowFeeds[irow]->setOrientation(orientation);
+    }
+  }
+
+
+} // End of anonymous namespace.
+
+
+namespace Mauka {
+
+  using Hurricane::UpdateSession;
+
+
+  void  MaukaEngine::insertFeeds ()
+  {
+    UpdateSession::open ();
+
+    SurfaceFeeds surfaceFeeds ( this );
+
+    forEach ( Occurrence, ioccurrence, getCell()->getLeafInstanceOccurrences() )
+    {
+      surfaceFeeds.addInstanceOccurrence ( *ioccurrence );
+    }
+    surfaceFeeds.insertFeeds ();
+
+    UpdateSession::close ();
+  }
+
+
+}  // End of Mauka namespace.
diff --git a/mauka/src/MaukaEngine.cpp b/mauka/src/MaukaEngine.cpp
index 8422c7cf..0596335d 100644
--- a/mauka/src/MaukaEngine.cpp
+++ b/mauka/src/MaukaEngine.cpp
@@ -41,6 +41,7 @@
 #include "hurricane/HyperNet.h"
 #include "hurricane/Timer.h"
 #include "hurricane/DataBase.h"
+#include "hurricane/UpdateSession.h"
 #include "crlcore/AllianceFramework.h"
 #include "nimbus/GCell.h"
 #include "nimbus/NimbusEngine.h"
@@ -62,6 +63,7 @@ using Hurricane::OccurrenceLocator;
 using Hurricane::PlugLocator;
 using Hurricane::HyperNet;
 using Hurricane::Timer;
+using Hurricane::UpdateSession;
 using namespace CRL;
 using namespace Nimbus;
 
@@ -145,7 +147,6 @@ void MaukaEngine::Run()
 
   //if ( doPlotBins() ) PlotBinsStats();
 
-  //cmess2 << endl << "  o  Simulated Annealing run took " << timer.getUserTime() << " s ..." << endl;
     cmess1 << "  o  Simulated annealing took " << Timer::getStringTime(timer.getCombTime()) 
            << " [+" << Timer::getStringMemory(timer.getIncrease()) << "]." << endl;
     cmess1 << "     (raw measurements : " << timer.getCombTime()
@@ -156,6 +157,7 @@ void MaukaEngine::Run()
     _bbPlacer = new BBPlacer(this);
     _bbPlacer->Run();
     _bbPlacer->Save();
+    if ( doInsertFeeds() ) insertFeeds ();
     //Plot();
 }
 
@@ -179,7 +181,7 @@ void VerifyPathCellBox(const Occurrence& occurrence)
 }
 
 void MaukaEngine::Construct()
-// **********************
+// **************************
 {
     typedef map<Occurrence, unsigned> InstanceOccurrenceMap;
     typedef set<Instance*> InstanceSet;
@@ -191,12 +193,34 @@ void MaukaEngine::Construct()
     
     DbU::DbU::Unit standardCellHeight = 0;
     
-    for_each_occurrence(occurrence, getCell()->getLeafInstanceOccurrences())
+    UpdateSession::open ();
+
+    forEach ( Occurrence, ioccurrence, getCell()->getNonLeafInstanceOccurrences() )
     {
-        Instance* instance = static_cast<Instance*>(occurrence.getEntity());
-        if (!instance->isFixed())
+      Box topLevelAbutmentBox = getCell()->getAbutmentBox();
+
+      Instance* instance = static_cast<Instance*>((*ioccurrence).getEntity());
+      if ( instance->isUnplaced() ) {
+        Cell* masterCell = instance->getMasterCell();
+        if ( masterCell->getAbutmentBox().isEmpty() )
+          masterCell->setAbutmentBox ( topLevelAbutmentBox );
+
+        instance->setTransformation  ( Transformation() );
+        instance->setPlacementStatus ( Instance::PlacementStatus::PLACED );
+      }
+    }
+
+    UpdateSession::close ();
+    
+    forEach ( Occurrence, ioccurrence, getCell()->getLeafInstanceOccurrences() )
+    {
+        Instance* instance = static_cast<Instance*>((*ioccurrence).getEntity());
+      //cerr << (*ioccurrence).getPath() << ":"
+      //     << instance << " " << (int)instance->getPlacementStatus().getCode() << endl;
+
+        if ( not instance->isFixed() and instance->isTerminal() )
         {
-            //cerr << "unplaced " << occurrence << occurrence.getBoundingBox() << endl;
+            //cerr << "unplaced " << (*ioccurrence) << (*ioccurrence).getBoundingBox() << endl;
             Cell* model = instance->getMasterCell();
             DbU::DbU::Unit insWidth = model->getAbutmentBox().getWidth();
             DbU::DbU::Unit insHeight = model->getAbutmentBox().getHeight();
@@ -208,22 +232,21 @@ void MaukaEngine::Construct()
                         + getString(instance->getName())
                         + " must be placed");
             }
-            _instanceOccurrencesVector.push_back(occurrence);
-            //VerifyPathCellBox(occurrence);
+            _instanceOccurrencesVector.push_back(*ioccurrence);
+            //VerifyPathCellBox(*ioccurrence);
             _instanceWidths.push_back(insWidth);
             InstanceSet::iterator isit = instanceSet.find(instance);
             if (isit != instanceSet.end())
             {
                 cerr << "Unplaced Instance : "   << *isit << endl;
-                cerr << "Unplaced Occurrence : " << occurrence << endl;
+                cerr << "Unplaced Occurrence : " << (*ioccurrence) << endl;
                 cerr << (*isit)->getPlacementStatus() << endl;
                 throw Error("Each unplaced instance must have one occurrence only");
             }
-            _instanceOccurrencesMap[occurrence] = instanceId++;
+            _instanceOccurrencesMap[*ioccurrence] = instanceId++;
             instanceSet.insert(instance);
             _instanceNets.push_back(UVector());
         }
-        end_for;
     }
 
     if (_instanceOccurrencesVector.size() == 0)
diff --git a/mauka/src/Row.cpp b/mauka/src/Row.cpp
index 3bbe1fd0..aeb417d3 100644
--- a/mauka/src/Row.cpp
+++ b/mauka/src/Row.cpp
@@ -40,6 +40,8 @@
 
 namespace Mauka {
 
+using std::cerr;
+using std::endl;
 using Hurricane::Error;
 
 Row::Row(Cell* cell, Surface* surface, const Box& box, bool orientation)
@@ -59,6 +61,7 @@ Row* Row::create(Cell* cell, Surface* surface, const Box& box, bool orientation)
         throw Error("Can't create Mauka::Row : empty surface");
     Row* row = new Row(cell, surface, box, orientation);
     row->_postCreate();
+
     return row;
 }
 
diff --git a/mauka/src/Surface.cpp b/mauka/src/Surface.cpp
index 3d58a564..47871035 100644
--- a/mauka/src/Surface.cpp
+++ b/mauka/src/Surface.cpp
@@ -327,16 +327,16 @@ typedef list<PlacementProblem*> PlacementProblemList;
             if (  (refInsSliceHeight % 2 == 0)
                or (orientation == Transformation::Orientation::ID)
                or (orientation == Transformation::Orientation::MX))
-              rowZeroOrientation = true;
-            else
               rowZeroOrientation = false;
+            else
+              rowZeroOrientation = true;
           } else {
             if (  (refInsSliceHeight % 2 == 0)
                or (orientation == Transformation::Orientation::ID)
                or (orientation == Transformation::Orientation::MX))
-              rowZeroOrientation = false;
-            else
               rowZeroOrientation = true;
+            else
+              rowZeroOrientation = false;
           }
                         
         // Tests for each Instance.
@@ -522,7 +522,6 @@ namespace {
     
 Row* Surface::InsertSubRowInRow(SubRow* subrow, bool orientation)
 {
-    //cerr << subrow << endl;
     Row* row = NULL;
     if (_rowVector.size() == 0)
     {
@@ -553,7 +552,6 @@ Row* Surface::InsertSubRowInRow(SubRow* subrow, bool orientation)
         }
     }
     row->_InsertSubRow(subrow);
-    //cerr << row << endl;
     return row;
 }
 
diff --git a/mauka/src/mauka/MaukaEngine.h b/mauka/src/mauka/MaukaEngine.h
index a30ac9bf..46ccae1f 100644
--- a/mauka/src/mauka/MaukaEngine.h
+++ b/mauka/src/mauka/MaukaEngine.h
@@ -117,6 +117,7 @@ namespace Mauka {
               void             Run                           ();
               void             Test                          ();
               void             Save                          () const;
+              void             insertFeeds                   ();
               void             PlotBinsStats                 () const;
               void             Plot                          () const;