What kind of reaction and shape would I probably get with this drilling on a Roto Grip Mars?  For my PAP (4 1/2 x 1/4 up), it would be 4 1/2" x 3", pin about 1/2" above the ring finger, and the CG below and right of the ring finger at about the 4:30 position, no weight hole.  

I have lower average to average hand, and roll about 13.5 - 14 mph at the pins (slightly speed dominate, so the lower speed works better for me).  Thinking about this for light to dryer conditions primarily on synthetics, or when the heads are going or are gone.