Do you think if you fixed his arch he could get to Top and have more #2 angle , more lag loading. He sort of looks like he's doing a lot of lifting to "get to parallel" in position golf speak. Leading to excess arm/ hand travel.... what some guys call "run off". The arms running away from the pivot a bit.
How long has he been playing? Is he a natural? Looks like it. If so his bad alignments , loss of EA in the third Station etc will be easy to fix as nothing is really ingrained as of yet. Old dogs , like me , we're way harder to retrain.
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