i'm using them tall and narrow like one would on a windsurf freestyle board, so feet shoved right in almost to the shins with the sides of my feet doing the gripping rather than the top of my foot, but a little more loose than normal to help them come out in a stack. I have ended up crashing in some awkward contorted positions because the board doesn't easily tilt over to help pull the feet out, plus occasionally ending up with the mast pointing upward - but this scares me less than having one foot come out while in the air because it wasn't in far enough

. at the time of writing this i've never tried in the surf so not sure if this is such a good thing for surf
once in, I don't feel the need to take them out of the straps to do anything except switching the feet. Not sure if it's a fluke with this combo, but the with mast track all the way to the back of the board, the gear seems perfectly balanced for everything, except for trying to go as fast as possible in stronger winds, in which case i need to crouch a little forward onto my front leg
to pump up onto the foil in the lightest winds that i can, i need to start pumping with feet just in front of the front and back straps. as soon as it starts to foil up i put front foot in and pump some more, then slip back foot in once theres a little speed. If there's a little more wind I just pump up with feet in the straps