FInless is a blast! We get lots of shallow water (3-4" deep) on low tides that is too shallow for fins. I like the surface 360's and the butter slides on the tip.
The surface 360 is a matter of getting unhooked, pulling yourself forward, and take a bow while passing the bar.Weight shifts from heels-toes-heels. Look either down left or down right when you enter the bow, and look downwind as you exit. It's fun and easy.
For the slide, just ride powered heelside, start leaning out, and shift like you're going toeside but lock into your stance 1/2 way. All your weight is far off to the side with front leg stiff and toes pointed up.. As you go into the trick, you can shift the rear tip downwind a bit more to get sliding and dial it back to 90 degrees. That will help you not go over the top
BTW, put some stickers over those screw holes- they are calibrated specifically to spray the rider in the eye.
Have fun!
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