
I realize that a short pin isn't the best example, but this is pretty consistent across his arsenal.
His dad is a bit of a ball nerd and actually to him to work with Slowinski. They came up with these pitches to try to pull the track from the holes.

Didn't work. Overall, the kid has made a ton of progress, but fights hitting the holes, which kills his ball roll. Here he is in action to give you a better idea of his release.
Slo mo of his release
He does a lot right, he can come out of left field with random changes. About a month ago, his follow through was going dead left and palm straight to the ceiling. Axis rotation was non-existent. Took me a two sessions to get him to start going around it again. As for this, I don't know. To the naked eye, it looks like he's getting around it enough, but that ball track says otherwise.
Any idea of tips/drills? Are asyms an option? With his rev rate and game, I would rather he get this fixed and not have to eliminate symmetricals. I know there's a fix, but I'm stuck.