I'm having a custom SUP Foil board shaped and am wondering what others thoughts are regarding concave or bottom contours? There's speculation with some that seems to make sense that concave helps create lift/ assist in easier release/less stickiness of the board in getting up on foil. In looking around at different shapes- they seem to run the gamut from dead flat to single concave, single to double, channels... all kinds.

When in doubt I always tend toward the simple solution. My shaper's previous iterations have been pretty flat- seemed to release pretty easy w/ a demo, but I'm considering a subtle single concave.

Anyone? Mahalo in advance.