Hi Larry,
I have not setup an item this way before (having a kit basically do conversion only) but it looks like the way you have it would work. The difference being that the Base UOM is the most granular that you want to track instead of the other way around as you previousy had it.
This way all the inventory is basically kept as all A1's in GP and when you sell an A6 you are selling a kit of 6 A1's.