Sweet setup Burnham - I might try to mod mine your way.
The real problem I have with the setup is how it pulls the throwbag up against the pole itself. Maybe it doesn't matter, but it always bothered me and I found that I can get a pretty steady shot regardless of how far down I pull.
But then again I'm really really strong. ;-]
By the way, did anyone else notice the large amount of unintended innuendo in this thread? I started it with "Hand works better," then I'm followed with "the gain of each cocking stroke."