diff --git a/OpenRA.Mods.RA/HasUnitOnBuild.cs b/OpenRA.Mods.RA/HasUnitOnBuild.cs
index 02fa212578..642d845813 100644
--- a/OpenRA.Mods.RA/HasUnitOnBuild.cs
+++ b/OpenRA.Mods.RA/HasUnitOnBuild.cs
@@ -19,36 +19,35 @@
 #endregion
 
 using OpenRA.Traits;
-
+using System.Linq;
 namespace OpenRA.Mods.RA
 {
-	class HasUnitOnBuildInfo : ITraitInfo
+	public class FreeActorInfo : ITraitInfo
 	{
-		public readonly string Unit = null;
+		public readonly string Actor = null;
 		public readonly string InitialActivity = null;
 		public readonly int2 SpawnOffset = int2.Zero;
 		public readonly int Facing = 0;
 		
-		public object Create( Actor self ) { return new HasUnitOnBuild(self); }
+		public object Create( Actor self ) { return new FreeActor(self, this); }
 	}
 
-	public class HasUnitOnBuild
+	public class FreeActor
 	{
-		
-		public HasUnitOnBuild(Actor self)
-		{
-			var info = self.Info.Traits.Get<HasUnitOnBuildInfo>();
-			
+		public FreeActor(Actor self, FreeActorInfo info)
+		{			
 			self.World.AddFrameEndTask(
 				w =>
 				{
-					var unit = w.CreateActor(info.Unit, self.Location 
+					var a = w.CreateActor(info.Actor, self.Location 
 						+ info.SpawnOffset, self.Owner);
-					var unitTrait = unit.traits.Get<Unit>();
-					unitTrait.Facing = info.Facing;
+					var unit = a.traits.WithInterface<Unit>().FirstOrDefault();
+					
+					if (unit != null)
+						unit.Facing = info.Facing;
 
 					if (info.InitialActivity != null)
-						unit.QueueActivity(Game.CreateObject<IActivity>(info.InitialActivity));
+						a.QueueActivity(Game.CreateObject<IActivity>(info.InitialActivity));
 				});
 		}
 	}
diff --git a/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj b/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj
index 0fbb26ae27..1026237cec 100644
--- a/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj
+++ b/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj
@@ -179,6 +179,7 @@
     <Compile Include="GainsExperience.cs" />
     <Compile Include="GivesExperience.cs" />
     <Compile Include="Invulnerable.cs" />
+    <Compile Include="ReplaceWithActor.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\OpenRA.FileFormats\OpenRA.FileFormats.csproj">
diff --git a/OpenRA.Mods.RA/ReplaceWithActor.cs b/OpenRA.Mods.RA/ReplaceWithActor.cs
new file mode 100644
index 0000000000..26e65dbe6c
--- /dev/null
+++ b/OpenRA.Mods.RA/ReplaceWithActor.cs
@@ -0,0 +1,43 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	class ReplaceWithActorInfo : ITraitInfo
+	{
+		public readonly string Actor = null;
+		public object Create(Actor self) { return new ReplaceWithActor(self, this); } 
+	}
+
+	class ReplaceWithActor
+	{
+		public ReplaceWithActor(Actor self, ReplaceWithActorInfo info)
+		{
+			self.World.AddFrameEndTask(w =>
+			{
+				w.Remove(self);
+				w.CreateActor(info.Actor, self.Location, self.Owner);
+			});
+		}
+	}
+}
diff --git a/mods/cnc/sequences-structures.xml b/mods/cnc/sequences-structures.xml
index 6ceef31843..69668b0404 100644
--- a/mods/cnc/sequences-structures.xml
+++ b/mods/cnc/sequences-structures.xml
@@ -18,6 +18,9 @@
     <sequence name="make" start="0" length="*" src="nukemake" />
   </unit>
   <!-- Tiberium Refinary -->
+  <unit name="proc.proxy">
+    <sequence name="make" start="0" length="*" src="procmake" />
+  </unit>
   <unit name="proc">
     <sequence name="idle" start="0" />
     <sequence name="active" start="0" length="30" />
diff --git a/mods/cnc/structures.yaml b/mods/cnc/structures.yaml
index 15a4ec250d..173a5b927f 100644
--- a/mods/cnc/structures.yaml
+++ b/mods/cnc/structures.yaml
@@ -36,14 +36,31 @@ NUKE:
 		Crewed: yes
 		Sight: 4
 	Bib:
-
-PROC:
+PROC.proxy:
 	Inherits: ^Building
 	Buildable:
 		Icon: procicnh
 		BuildPaletteOrder: 30
-		Prerequisites: silo
+		Prerequisites: nuke
 		Owner: gdi,nod
+		Cost: 2300
+		Description: Tiberium Refinery
+		LongDesc: Processes Tiberium into useable resources
+	Building:
+		Power: -50
+		Footprint: ___xx xxxxx xxx__ xxx__
+		Dimensions: 5,4
+		Capturable: true
+		HP: 900
+		Armor: wood
+		Crewed: yes
+		Sight: 6
+	ReplaceWithActor:
+		Actor: proc
+
+PROC:
+	Inherits: ^Building
+	Valued:
 		Cost: 2000
 		Description: Tiberium Refinery
 		LongDesc: Processes Tiberium into useable resources
@@ -65,18 +82,23 @@ PROC:
 		ProcessAmount: 50
 	CustomSellValue:
 		Value: 600
-	HasUnitOnBuild:
-		Unit: HARV
+	FreeActor:
+		Actor: HARV
 		InitialActivity: Harvest
 		SpawnOffset: 1,2
 		Facing: 64
-		
+	FreeActor@silo1:
+		Actor: silo
+		SpawnOffset: 3,0
+	FreeActor@silo2:
+		Actor: silo
+		SpawnOffset: 3,1
 SILO:
 	Inherits: ^Building
 	Buildable:
 		Icon: siloicnh
 		BuildPaletteOrder: 20
-		Prerequisites: nuke
+		Prerequisites: proc
 		Owner: gdi,nod
 		Cost: 150
 		Description: Tiberium Silo
diff --git a/mods/ra/structures.yaml b/mods/ra/structures.yaml
index e3ff334221..c8e26c2d58 100644
--- a/mods/ra/structures.yaml
+++ b/mods/ra/structures.yaml
@@ -478,8 +478,8 @@ PROC:
 	IronCurtainable:
 	CustomSellValue:
 		Value: 600
-	HasUnitOnBuild:
-		Unit: HARV
+	FreeActor:
+		Actor: HARV
 		InitialActivity: Harvest
 		SpawnOffset: 1,2
 		Facing: 64