I am glad you passed. On the Power Grooves the ball is actually asymmetric because the two hook pucks aren't installed exact.
You have to have it spun to locate the correct PSA, then draw a line from it 6 3/4" through the cg to locate the correct low rg axis.(pin) I have 4 that have been spun on a determinator and the end result is the pin, cg, psa are all inline with the original pin cg markings, but the pin averages 1.5-2" further away from the cg then marked by the actual pin.
That may explain your reaction problem. I would consider 500/1000 on surface or 360/1000. I would also check the flare rings on the ball and where and how they are placed to see if adding a weight hole would help.