My home house has 1+ yr old SPL overlays and what I would call a medium volume shot at 42' in length. 95% of the 10's left in the house are due to one of three factors:
1. Hook monsters that have used up all their energy in the front (Wrong piece, wrong match-up, wrong zone or wrong surface)
2. Too much ball speed (Again, wrong piece, wrong surface or wrong zone ending in weak entry angle) Last time I checked, a ball has to slow down to hook and when it does not slow down, you have the wrong angle.
3. Not strong enough rolling ball and flat entry angle (AGAIN, wrong piece, wrong matchup, wrong zone or wrong surface)
Why do you think the pro shops are selling so many different pieces to combat all patterns, etc? Bowlers do't walk through the doors with 10+ ball arsenals because they like the colors...they are trying to match up for the best carry (best entry angle, best overall ball read on the lanes, best ball read front to back, best ball motion and path, etc).