Yes it sounds like money well spent and yes "Hinge" is the right term.
Hinge It To A Better Physical Game by Joe Slowinski
http://bowlingknowledge.info/images/...inskifeb09.pdf
In the February 2009 Slowinski at-large, I discuss the benefits of using a hinge in your physical game. Specifically, I discuss how the hinge has a relationship with:
(*) target accuracy
(*) grip pressure reduction
(*) body tension reduction
(*) increased ball speed
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