Did I open up a can of worms or what, thanks for all the comments, it was eye opening. The one thing I worry about is if I buy a ball and it doesn't work, I usually sell but I'm so wrong the next ball I get won't work I just use what I've got. My Resurgance was still working great when I got a Black Widow Venom which did nothing on the condition I bowl on, then Twisted Fury which started out bad and now starting to hit good, just got a Black Widow Nasty which is doing pretty well. For bowling one night a week and averaging 210, can't complain to much, I sub in two others and average over 200, until I bought a No Mercy, my first new ball in years, is when my average started to average started to go up.