Here are two quotes from Ricky, there is a tread about this on "Hey Rick". It is in the "Fletching jig / clamp combos" post. I hope this helps.
"Get a martin jig with left wing clamp the whole jig cost less than a bitz clamp. The bitz puts to much helical on the feather, remerber how I showed you to make sure the front of the inside feathers are turned the way I showed you.call me if you need to.
"Better yet just buy the martin clamp and use it on the bitz jig. that is the cheapes thing to do.