RICO.  

Pin in center of grip, CG is out and down at 45*, extra hole is 6.75" from center through CG for symmetrical balls, 5" for Asymmetrical balls. 7/8" bit 2.5" deep.  

Very controllable reaction and roll.  Back end reaction in a Asymmetrical ball is much stronger vs symmetrical.  High rev rates like it to control the back end, low rev rates like it for getting into a roll.  

If you want more info, do a search for RICO and many topics will be shown.  

RICO layout is a good addition to a arsenal.