Ah, ok, I see the difference between the $27 and $50 one. It's the grip range. The $27 might not work.

EDIT: I retract that statement. After re-reading the write up, since you only use the handle, the grip range would not matter as that would change when you put the stock guts on the grip. I am going to order the $27 one and I'll give it a shot and let you guys know what I find out. If it doesn't work out, then I'll be in for the group order.