Borrowed the picture again (from Col555 , thank you ) to ask one more question:

How important is exact, flush mounting of your fin relative to board surface ?

With all this attention to the shape of the board, size and shape of the fin this small imperfections - like mounting protruding or should have significant effect on performance (?)




if that few milliliters protruding from the box make any difference at all ?


or sinking ?
which one is worse ...


Sometimes when filing new fin to fit I over-do it and fin will sink too deep.

How to fix it ?

I thought maybe to use old trick from snow skis ? pour parafine from candle and scrap access to perfect level ?