I am not a driller but am learning about layouts and ball dynamics.  My question has to do with looking for the optimum drill angle for skid flip.  I know a longer pin to pap and pin above the fingers(close to VAL) will promote skid flip in a ball.  It does this because it puts the ball in a higher RG state and allows the ball to retain more energy for the back part of the lane.(correct me if I am wrong)
Now when it comes to assymetrical balls I could never get a straight answer as to what was the best drill angle for skid/flip.  Some say strong position 45 deg, some say bigger angle of 70 or more.. others say it depends on the bowler.

I had a thought that it may depend on angle of the track in relation pin to cg or mb line.  I know this would be way easier visually but I give it a shot.  So if you put the pin to mb line parallel to the rotation of the ball the mb or added weight from the cg would be facing a 90 deg on the core as it rotates.. If this line crosses the rotation line (more like a 70 to 90 deg drill) the mb or cg weight will be on the outside of the core during rotation .. and if you go inside the rotation line (40 to 0 deg drill) the mb or cg weight will be on the inside of the rotation..
I am not sure how if if this relation would have anything to do with how the ball rolls but I was thinking that parallel to this rotational line or slightly toward the pap would be the optimum angle for skid flip.. as I have seen balls with very large drill angles not finish.. and shorter drill angle be too rolly..

this is just a crazy random thought and doesn't really have concrete physics behind it.. but as I layout balls and look at how they would roll it seems like it could make sense.
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16-17 mph
350-475 rpm
PAP 5 1/2 x 3/8 up
High Game 300 x 3
High Series 782
Book Average 215 / 205
PBA Xperience ave 180
years bowling 22