Ik with the flanges but you could just use spacers if it was integrated with another subsystem but if its independent it would be fine.
granted if you have to use HS shafts there it’ll probably break regardless
true, but vex flanges aren’t divisible by any spacer or washer vex sells. you could do it with some from mcmaster though
or pull a booper and sand the spacers down. although i tried that once with steel and sanded part of my thumb off (it wasn’t fun)
so true bestie