I reckon it's amazing how much speed concaves generate. So good on small wave boards for instant speed. Makes em like a skateboard. That said I reckon slight vee is great for a step up board for good waves as you can really generate speed going from rail to rail.
Rant over.

Nothin quite like sittin down with your local shaper and doing something different to the norm it's great when they even work here's some of stoneys and my ideas coming together its got me back on a short board after 5 years of only riding sup it's good to get back to the roots where it all started

8"0 x24 sup inspired prong
6"3" x21 3/4"
5"7 x 19 1/2 tomo van ripoff

The prong carbon rail stringer less quad plus nub 5.5 kg

The van stone so sik never ridden any thing like it the loosest drive st fastest