I am currently using the Sarge Easter and am pleased with the results. I have a very high rev-rate and speed and was having trouble with strong backends. My rev rate has not decreased overall and I am able to stay behind the ball much better.
I had to try a few different spans on the ring finger before I got it right, but the first span was a little short and I had a pain on the backside of my ring finger after bowling. This was due to the back of the finger hitting the back of the hole on exit. So, done give up on it if it doesn't feel right at first, give it a few sessions and don't be afraid to make tweaks to the pitches and spans.
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Kegel Connection - Seminole
8668 Park Blvd.
Seminole, FL
727-395-0412
inside Seminole Lanes.