JB said..
I'm not sure why you like you mast where it is, but if you've tried further back and prefer it where it is that's great. But have you?
I moved a lot my straps position, which amounts to the same thing once in the air (where only the distance between your mast and feet counts).
My personal experience is that I ended up having my feet more forward at the end (which would mean having the mast back if you'd rather move your mast than your feet). With experience, you are able to fly faster, and the foil becomes definitively more controllable if you are farther in front of the mast. I must say that I didnt found the rear foot position very important (except in carving turns), the front foot was the critical one.
The advantage of having a mast back for paddling is that the board has less row effect. A more centered mast on short SUPs may require a board with less row, be it with the shape (parallel square rails like the current dedicated foil boards), some small fins, ... Of course you can compensate the row with paddling technique, but it makes your paddling less efficient so it may not be the best solution.
"My stance doesn't change (or at least not very much) between paddling, take off and gliding" -> I guess this means your mast position is at the sweet spot, which was my point. And actually, we seem to have the same feet and foil placement judging by your videos, e.g. the one I just posted on "Show us your foiling setup".
Note also that with straps, you can have a bit more tolerance with the feet position while paddling, as you can compensate by some push/pull rocking motion on the straps, that actually help a lot as a mini-pumping on liftoff on slow "glorified chop" waves.
Piros, I think it would be helpful to others if you described how you strained your ankle with the strap, to prevent them for doing the same?