Good point Ex,
Unfortunately this does happen, probably more often than not but that's what hopefully this site and others can help solve with education. I realize some bowlers may not have the most educated drillers but it's really not that difficult once it is explained.
My personal recommendation to those who do not have drillers that listen to your thoughts or comments, it's definitely time to seek another driller. Simple question, how many times would you return to a restaurant who keeps making your steaks well done when you keep asking for it medium rare?
Real simple guys, we know a weightblock will always fight towards it's preferred spin axis (psa) or resting point due to gravity, so either we "assist" or "delay" that motion. The mass bias (>.008) on a ball has the same effect to some degree, either we assist the ball motion or we delay it by placing it accordingly. Please print this to help your discussions with your ball drillers that do not understand that principle, it may help.
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Rick Leong
Ten Pins Pro Shop
Track Intl. - Amateur/Pro Shop Staff
Vise Inserts Staff