I mounted the bindings at 21 inches which is where the boards "center" is. I didn't mess with moving my stance in terms of forward or backwards since I don't' see too much powder. I took the pics from that angle because I'm just worried about the left/right positioning of the straps. If I took any other angle you wouldn't be able to tell at all if they are centered correctly no?
well the left/right positioning looks fine to me. and 21 inches is a pretty good stance, it just doesn't look that wide in the picture. must be the angle it was taken at.