Tried it, but did some conversion in order to utilize simple, round, grip holes that can later be applied to to oval inserts and oval thumb in a urethane slug. No bevel on the fingers is just fine, at the moment, but the fresh urethane cover of the ball utilized was too grabby even after bevel until I worked some oil into the coverstock in the thumb hole.
It's a different fit, might be a good fit... but I am waiting until the off season to take the next step to inserts and slugs. Will go with the standard, T-grip, way of referencing the pitches I found using this technique in the future though... Makes it easier on my driller