I have also been using a Groove Urethane for spares. It's also great to have if you are playing on very short sport patterns. You have to kill your shot at spares because the ball does hook, but it reads true and won't back up on you like a plastic will.
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Corey Clayton
Brunswick Amateur Staff
Turbo Grips Staff
Team Canada 2007, 2008, & 2009
All my equipment is professionally drilled by Rich Huzina at Strikes Pro Shop, Let's Bowl Calgary, AB
The opinions expressed are solely those of the writer and not of Brunswick Corporation