actually im one of those guys that buys a bowling ball and has it drilled like my setup, then ill have it drilled like the factory suggest it to be drilled. And if i dont like it after 20 or so games (on either setup) i dont throw with it anymore. Its a comfort thing with me... I have only been bowling almost 3 years now. So im still learning as i got hence why i have so many bowling balls. But most people specially when they bowl in tournies and such will carry 3-4 balls with them.
p.s. since your into bowling are you bowling in the state tourney at all?
And I would say more like 25% is the ball 50% is mental and the rest is your release, ball speed, hand rotation or over rotation and blah blah blah blah blah. If you get to where your shooting 200's consistantly with the same ball on a house shot you will fight yourself more then you will fight the ball. People forget alot of times to let the ball do the work. IMO.
