Good Points: You seem to do a good job of walking straight on the approach without much drift. Your ball speed also seemed to stay pretty consistent from shot to shot, which is also good.
Things To Work On: If you can not get lower with your knee, then you need to really focus on a clean release every time to ensure you will not keep dropping the ball. Keep your hand under the ball longer and wait to rotate your wrist aorund the ball until your thumb comes out first, this should help with dropping the ball. Also, it seems that part of your problem with falling off the shot comes from your right arm flailing off to your right after your follow through, which in turn pulls your body in that direction, causing you to fall off consistently to the right. If you need to swing the ball don't encircle the follow through with your arm to do so, try and angle your shoulders and feet at the foul line to point to the right going across your mark, and make sure you follow straight through the shot, no flailing. Since you walk pretty straight, you should be able to open up your shoulders a little and see good results and better balance at the line.
Also, try less reverse pitch in your thumb (if you have any now), that will help with projecting the ball out on the lnae. All in all, not a bad form, these are just my ideas to help you out. Good luck!!!
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MainePBA (Also known as MaineLefty)