Heavy1 said..Some foil fails from interesting angles. Still thinking to get some submerged shots.
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Hi Lyndon,
Interesting to watch these angles, it's a good way to see what you're doing right or wrong. Can I suggest you have a look at your foot placement from 1:08 through to 1:18. I would suggest your back foot (left foot in this case) movement is nowhere near aggressive enough and should have been right the way across the other side of the board, at least across the opposite side of the centre line at the very least (also not as far back).
Where your foot placement is in the video, you will never be able to keep the angle on the board to complete the turn as both your feet are on the wrong side of the board to complete the transition. Also the as your back foot is so far back, any weight you place on it launches the board upward, you can see this happen in the video, and then the board stalls and it falls back to the water surface.
Try moving your back foot right across the board and slightly forward in one movement (your toes just behind the front footstap on the far side). When you you come out of the completed gybe, your back foot from the previous tack becomes your front foot on the new tack, so you want it pretty close to the front footstrap as far as fore/aft positioning goes. Then when you move your other foot to the new back position, your front foot is already in place. It should simplify your foot movements and give you a much better chance of completing more gybes.
Flying gybes certainly aren't easy, and expect a few more swims, but hopefully my advice helps.