Thanks wapitihunter. That helps a lot. There's a link that you can download a lot of the same stuff that TODDID puts out. Its a trial thing so its free. I think you can use it once or twice. When I get Hoke ill post the link. I do know that its better to have too stiff a spine than too weak. In my case I'm certain that I'm too stiff. Unfortuq nately I probably can't do anything about it since my bow is tuned really well, I'm shooting superb groups and I start flitting school next week so I wont have time to redo my stuff