@Mostropovich 

That sounds like the most efficient way to do it IMO.  My only suggestion would be to use a clearing account under the "Inventory adjustment account" pull-down menu instead of the Inventory Shrinkage COGS account.  This keeps your COGS account cleaner.  Each time you make one of these transfers you are creating three entries into COGS which always net to zero, or at least it should.  Using a clearing account will keep things neater and make it easier to find discrepancies if you run into any down the road.