diff --git a/Makefile b/Makefile
index 1e7c471..3188393 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@
 # go install
 
 
-all: droplet.pb.go hypervisor.pb.go cluster.pb.go event.pb.go experiments.pb.go
+all: droplet.pb.go hypervisor.pb.go event.pb.go experiments.pb.go
 	make -C example
 
 vet: lint
@@ -54,14 +54,6 @@ experiments.pb.go: experiments.proto
 		--go_opt=Mexperiments.proto=go.wit.com/lib/protobuf/virtbuf \
 		experiments.proto
 
-cluster.pb.go: cluster.proto
-	cd ~/go/src && protoc --go_out=. --proto_path=go.wit.com/lib/protobuf/virtbuf \
-		--go_opt=Mdroplet.proto=go.wit.com/lib/protobuf/virtbuf \
-		--go_opt=Mcluster.proto=go.wit.com/lib/protobuf/virtbuf \
-		--go_opt=Mhypervisor.proto=go.wit.com/lib/protobuf/virtbuf \
-		--go_opt=Mevent.proto=go.wit.com/lib/protobuf/virtbuf \
-		cluster.proto
-
 deps:
 	apt install golang-goprotobuf-dev
 	apt install protobuf-compiler
diff --git a/cluster.proto b/cluster.proto
deleted file mode 100644
index 9569465..0000000
--- a/cluster.proto
+++ /dev/null
@@ -1,23 +0,0 @@
-syntax = "proto3";
-package virtbuf;
-
-import "droplet.proto";
-import "hypervisor.proto";
-import "event.proto";
-import "google/protobuf/timestamp.proto"; // Import the well-known type for Timestamp
-import "google/protobuf/duration.proto"; // Import the well-known type for Timestamp
-
-message OldCluster {
-        int64 id = 1;
-        repeated string dirs = 2;
-
-	repeated Droplet droplets = 3;
-	repeated Hypervisor hypervisors = 4;
-	// repeated Event events = 5;
-
-        // Droplets d = 6;
-        Hypervisors h = 7;
-        Events e = 8;
-        google.protobuf.Timestamp       unstable       = 9;    // the last time we heard anything from this droplet
-        google.protobuf.Duration        unstable_timeout       = 10;    // the last time we heard anything from this droplet
-}
diff --git a/human.go b/human.go
index c6a2fbc..02dc588 100644
--- a/human.go
+++ b/human.go
@@ -116,14 +116,14 @@ func (d *Droplet) SprintHeader() string {
 	switch d.Current.State {
 	case DropletState_ON:
 		dur := time.Since(d.Current.OnSince.AsTime()) // time since 'ON'
-		header += " (on :" + FormatDuration(dur) + ")"
+		header += fmt.Sprintf(" (on :%3s)", FormatDuration(dur))
 	case DropletState_OFF:
 		// everything is as it should be with this vm
 		dur := time.Since(d.Current.OffSince.AsTime()) // time since 'OFF'
-		header += " (off:" + FormatDuration(dur) + ")"
+		header += fmt.Sprintf(" (off:%3s)", FormatDuration(dur))
 	default:
 		dur := time.Since(d.Current.OffSince.AsTime()) // use 'OFF' here?
-		header += " (???:" + FormatDuration(dur) + ")"
+		header += fmt.Sprintf(" (?? :%3s)", FormatDuration(dur))
 	}
 	return header
 }
@@ -144,14 +144,14 @@ func (d *Droplet) SprintDumpHeader() string {
 	switch d.Current.State {
 	case DropletState_ON:
 		dur := time.Since(d.Current.OnSince.AsTime()) // time since 'ON'
-		header += " (on :" + FormatDuration(dur) + ")"
+		header += fmt.Sprintf(" (on :%3s)", FormatDuration(dur))
 	case DropletState_OFF:
 		// everything is as it should be with this vm
 		dur := time.Since(d.Current.OffSince.AsTime()) // time since 'OFF'
-		header += " (off:" + FormatDuration(dur) + ")"
+		header += fmt.Sprintf(" (off:%3s)", FormatDuration(dur))
 	default:
 		dur := time.Since(d.Current.OffSince.AsTime()) // use 'OFF' here?
-		header += " (???:" + FormatDuration(dur) + ")"
+		header += fmt.Sprintf(" (?? :%3s)", FormatDuration(dur))
 	}
 	return header
 }