We have used what we have learned to derive the MOtion Hole layout technique as well as the further development of our patented cores. Gyroscopic inertia! Ball retains axis tilt and rotation longer and deflects less.

The pin position determines the starting reaction to build from.
Pin under = smoothest starting reaction - for more rev. dominant bowlers
Pin in, or beside (depending on PAP) = medium starting reaction
Pin over = strongest starting reaction - for speed dominant or rev. challenged

A small amount of caution has to be taken for extremely high track players. If the bowler tracks very close to the middle finger (within 1/2"), don't use the pin under, drilling. Start with a 9/16" MOtion hole on a pin beside, drilling.

You can use pins above, beside, or under the finger line as long as you keep the pin to PAP distance between 3" and 4 3/4". I like to keep it between 3 and 4 1/2" for most bowlers. For very rev dominant bowlers, I'll go as far as 5", if needed. Outside that range you'll end up with less flare. The results might end up with too much length since the increase in gyroscopic inertia will make the ball stay on its axis longer. Because of the increase in "gyroscopic inertia" created by the MOtion hole, it will add length to the 2nd transition. Increase the ball surface a little to get the ball to come off its axis and you'll wake it up.

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. Those numbers may need to be adjusted for a small amount of bowlers to remain flare safe.
Add the MOtion hole to increase backend reaction and better pin action. Start with a 5/8" to 3/4" hole and, then, increase by 1/8ths" 'til you get the desired reaction.

The MOtion Hole is a more powerful tool than people anticipated in some cases. I suggest starting with a smaller hole, then increasing it 'til it's just right.
It's much easier to make a hole bigger, than smaller.