I just put a Motion hole in a Mojave (if it is still categorized as a Motion Hole). The ball only had a 2 3/8" pin. Bowler needed pin beside ring finger (PAP of 6" over and 1 3/8" up) which put the CG very high on center-line (& PSA marker questionably close to NAP if thumb-hole and Motion hole close to thumb axis did not bring PSA back towards the PAP, I gambled). Ball had 2.6 oz top wt and bowler uses Mrs. finger inserts.Mo Pinel wrote: Those numbers may need to be adjusted for a small amount of bowlers to remain flare safe. The ideal location for the MOtion Hole ends up being 1 1/4" from the initial flare ring at least 10" from the pin avoiding the bowtie.
To remove finger wt. with Motion hole (after drilling fingers 3 1/2" deep), I had to move the hole to 9" and keep it in the finger half of the ball. I was just curious about how much difference in reaction would I have expected compared to if I could have used a ball with a longer pin to CG distance & been able to use the recommended 10" hole (drilling the Mojave as a symmetrical)? or would the ideal have been 11" ?