Why not just put the mb spot in the Thumbhole..?? That should take any of the mb or asymmetrical properties out of the layout.. A symmetrical ball will spin up to the thumbhole on a determinator after it is drilled.
just place the pin to pap distance and you should be ok I would think...
--------------------
16-17 mph,350 rpm,PAP 5 1/2 x 3/8up, HighGame 300 x 4, High Series 808
Book Average 205,PBA Xperience ave180