So from what I am getting is that if you want the ball to be more on the "rollie" side pin down would be the way to go and if you want to clear the fronts pin up would be the way to go. I know I am overly simplifying it but is that the general gist of it?
The general gist is that the pin up or down has no relevance on where the ball transitions especially on symmetricals. That relates to surface. To better explain it, if you drilled one ball pin up with the same pin to pap as another of the same ball pin down, you would would see very little difference if any in the 2 balls. You may see a slight difference in shape because of the difference in differentials but you would pretty much be able to stand in the same spot and throw the ball in the same area and see the same reaction. It isn't until you start applying weight holes to change the asymmetry, that you will see a reputable difference in reaction.
The reason the assumption of pin up versus pin down exist is because 7/10, when drilling the ball pin down, there is an excess of thumb weight which requires a weight hole in that area moving or strengthening the PSA, creating more flare which transitions energy faster so you get a smoother look to your reaction. Without the hole, the difference will be extremely minimal.
The ball will have a new pin position and PSA on symmetricals or stronger PSA or movement of MB on Asyms once drilled so pin up or down is irrelevant. There are also diff changes that play a roll in down lane transition.
The best answer is pin to pap controlling flare potential, weight hole placement manipulating PSA strength or movement, and most importantly surface to dictate when the ball transitions.
