flight05, Just got a chance to check out your video and cograds on your victory. Although I studied the single arm technique I was never a big fan of it(But don’t tell the 70’s Russian jumpers I said that). Here’s what I saw.
Hop phase – You need to Use the arms a bit more while running off the board.
Step phase- this looks like you best phase, your hips are square with proper knee thrust and arm swing.
Jump phase- By far your worst phase. Your off balance from the start with you Torso up going to your right. And if you frame it, your right knee goes across your body to the left. Although your head starts high you quickly drop it as though you are falling not landing. You do a double arm rotation in the air to the rear position which causes a braking effect try to shoot the arms up then forward. And once again falling out of the sky your left leg hits the sand first and seems to be at least one foot ahead of the right.
You can correct your technique with infield bounding and short 2 and 5 step popups into the pit, concentrate on being PERFECT with your form when doing workouts without speed. May I ask what grade level are you?