A woman in one of my leagues whom is on the same team as I am, has a lot of speed and revs and used to average 180-185. She is an excellent bowler, but used to be very inconsistant as she would roll 650 on one lane condition and 480 on another. Her ball would be "alive" on one condition and a "dud" on another.....The local driller then drilled a new ball for her, just like the one she was using and her ball became "alive" on any condition, she became consistant, her scores "shot up" and she now averages 200-207. Her increase in performance isn't a few weeks thing. She has been averaging this 200-207 for 4 months now.

I asked the driller what was different and he said he drilled the new one "Reverse Leverage.".... What in the world is Reverse Leverage?

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Don't wear your self out cutting wood with an axe...Use a Buzzsaw

Yep it's a modification, a kicked out revs leverage.

Or the fact that the cg is down has much of the same effect.

Lane#1 used to show a revs leverage somewhat similar to this on teh original carbide.

CG down and kicked out a bit.  Note cg below weighthole.
REVS leverage means exactly that, it revs early!!!!  Not reverse!

The pure revs leverage with the weighthole down 6 inches from PAP
REVS(not reverses) so fast that it seems the thing actually revs about 2 times even if one hardly lofts at all before it gets to the lane, often giving the impression that the player has lowered his track when looking at flare lines!

Your driller does not know terms but it sounds like he knows how to produce good results!

REgards,

Luckylefty