diff --git a/helpers/DualityInterface.java b/helpers/DualityInterface.java
index 1413faea2..fb72b043b 100644
--- a/helpers/DualityInterface.java
+++ b/helpers/DualityInterface.java
@@ -367,6 +367,13 @@ public class DualityInterface implements IGridTickable, ISegmentedInventory, ISt
 
 			if ( itemStack.getStackSize() > 0 )
 			{
+				// make sure strange things didn't happen...
+				if ( adaptor.simulateAdd( itemStack.getItemStack() ) != null )
+				{
+					changed = true;
+					throw new GridAccessException();
+				}
+
 				IAEItemStack aquired = Platform.poweredExtraction( src, destination, itemStack, mySrc );
 				if ( aquired != null )
 				{
@@ -383,6 +390,14 @@ public class DualityInterface implements IGridTickable, ISegmentedInventory, ISt
 
 				long diff = toStore.getStackSize();
 
+				// make sure strange things didn't happen...
+				ItemStack canExtract = adaptor.simulateRemove( (int) diff, toStore.getItemStack(), null );
+				if ( canExtract == null || canExtract.stackSize != diff )
+				{
+					changed = true;
+					throw new GridAccessException();
+				}
+
 				toStore = Platform.poweredInsert( src, destination, toStore, mySrc );
 
 				if ( toStore != null )
@@ -394,9 +409,9 @@ public class DualityInterface implements IGridTickable, ISegmentedInventory, ISt
 					changed = true;
 					ItemStack removed = adaptor.removeItems( (int) diff, null, null );
 					if ( removed == null )
-						throw new RuntimeException( "bad attempt at managing inventory. ( addItems )" );
+						throw new RuntimeException( "bad attempt at managing inventory. ( removeItems )" );
 					else if ( removed.stackSize != diff )
-						throw new RuntimeException( "bad attempt at managing inventory. ( addItems )" );
+						throw new RuntimeException( "bad attempt at managing inventory. ( removeItems )" );
 				}
 			}
 			// else wtf?
diff --git a/tile/powersink/RedstoneFlux.java b/tile/powersink/RedstoneFlux.java
index 50f4ff2ee..765cda86c 100644
--- a/tile/powersink/RedstoneFlux.java
+++ b/tile/powersink/RedstoneFlux.java
@@ -21,10 +21,21 @@ public abstract class RedstoneFlux extends RotaryCraft implements IEnergyHandler
 		}
 		else
 		{
-			double overFlow = injectExternalPower( PowerUnits.RF, maxReceive );
+			int demand = (int) Math.floor( getExternalPowerDemand( PowerUnits.RF ) );
+
+			int ignored = 0;
+			int insertAmt = maxReceive;
+
+			if ( insertAmt > demand )
+			{
+				ignored = insertAmt - demand;
+				insertAmt = demand;
+			}
+
+			double overFlow = injectExternalPower( PowerUnits.RF, insertAmt );
 			double ox = Math.floor( overFlow );
 			internalCurrentPower += PowerUnits.RF.convertTo( PowerUnits.AE, overFlow - ox );
-			return maxReceive - (int) ox;
+			return maxReceive - ((int) ox + ignored);
 		}
 	}