diff --git a/doGui.go b/doGui.go
index d61f7f5..876aafd 100644
--- a/doGui.go
+++ b/doGui.go
@@ -54,6 +54,10 @@ func doGui() {
 		makeZoodWin()
 	})
 
+	grid.NewButton("Cluster Events", func() {
+		log.Info("todo: start a list here!")
+	})
+
 	// sit here forever refreshing the GUI
 	for {
 		refresh()
diff --git a/http.go b/http.go
index 2b70d8e..baebf24 100644
--- a/http.go
+++ b/http.go
@@ -41,31 +41,6 @@ func okHandler(w http.ResponseWriter, r *http.Request) {
 	if route == "/machine" {
 		handleMachine(r, w, hostname, msg)
 		return
-
-		/*
-			var m *zoopb.Machine
-			m = new(zoopb.Machine)
-			if err := m.Unmarshal(msg); err != nil {
-				log.Info("zoo host sent unknown machine protobuf len", len(msg))
-				forgepb.IdentifyProtobuf(msg)
-				log.Info("error =", err)
-				return
-			}
-			log.Log(INFO, "proto.Unmarshal() worked on wire message len", len(msg), "from", m.Hostname)
-			b := me.upgrade[m.Hostname]
-			switch updateMachine(m) {
-			case "upgrade":
-				if b {
-					fmt.Fprintln(w, "apt update")
-					me.upgrade[m.Hostname] = false
-				} else {
-					fmt.Fprintln(w, "upgrade")
-				}
-			default:
-				fmt.Fprintln(w, "notsure")
-			}
-			return
-		*/
 	}
 
 	if route == "/status" {
diff --git a/machine.go b/machine.go
index 7944e9b..8ddf63f 100644
--- a/machine.go
+++ b/machine.go
@@ -4,6 +4,7 @@
 package main
 
 import (
+	"fmt"
 	"net/http"
 	"strings"
 	"time"
@@ -53,6 +54,7 @@ func handleMachine(r *http.Request, w http.ResponseWriter, hostname string, data
 		log.Info("hostname ua changed len =", len(data), ra, hostname, ua)
 		m.UserAgent = ua
 	}
+	fmt.Fprintln(w, "upgrade")
 	// log.Info("update machine protobuf", hostname)
 	updateMachine(newm)
 }
diff --git a/structs.go b/structs.go
index 154af32..c65bd52 100644
--- a/structs.go
+++ b/structs.go
@@ -4,6 +4,7 @@
 package main
 
 import (
+	"sync"
 	"time"
 
 	"go.wit.com/gui"
@@ -33,6 +34,7 @@ type zookeep struct {
 }
 
 type stdTableWin struct {
+	sync.Mutex
 	win    *gadgets.GenericWindow // the machines gui window
 	box    *gui.Node              // the machines gui parent box widget
 	TB     *zoopb.MachinesTable   // the machines gui table buffer
diff --git a/windowZood.go b/windowZood.go
index 3aeca05..f62da2c 100644
--- a/windowZood.go
+++ b/windowZood.go
@@ -34,6 +34,8 @@ func makeZoodWin() {
 }
 
 func doMachinesUpgradeTable() {
+	me.zood.Lock()
+	defer me.zood.Unlock()
 	if me.zood.TB != nil {
 		me.zood.TB.Delete()
 		me.zood.TB = nil
@@ -45,6 +47,7 @@ func doMachinesUpgradeTable() {
 		log.Info("upgrade machine", m.Hostname, "memory", m.Memory/(1024*1024*1024))
 		log.Info("ADD THE CODE TO TRIGGER AN UPGRADE HERE")
 		log.Info("ADD THE CODE TO TRIGGER AN UPGRADE HERE")
+		m.Upgrade = true
 	}
 	me.zood.TB.Custom(f)
 	log.Info("table has uuid", me.zood.TB.GetUuid())
@@ -66,6 +69,14 @@ func AddMachinesPB(tbox *gui.Node, pb *zoopb.Machines) *zoopb.MachinesTable {
 		return findVersion(m, "zood")
 	})
 
+	// show if the machine needs to be upgraded
+	t.AddStringFunc("triggered?", func(m *zoopb.Machine) string {
+		if m.Upgrade {
+			return "yes"
+		}
+		return ""
+	})
+
 	t.AddTimeFunc("age", func(m *zoopb.Machine) time.Time {
 		return m.Laststamp.AsTime()
 	})