starting to look pretty sweet guys you could cut more vol out in certain areas of the deck leaving you with foot bumps but a slightly slicier bow to make cart wheel type moves and intiating loops etc easier.
For surfing i personally prefer the tri fin set up have used both systems and its more versitile as if you put three fin boxes in you can move the fins to suit the conditions run either a single centre fins for a looser carving boat, twin fins for a loose but tighter carving or tri fin to give more grip crisper tuns.
for a proto type you coiuld try placing different fin boxes in the hull to find out which you prefer and then make the second boat with that fin set up
GOOD LUCK GUYS HAVE FUN cant wait to see the plug and the finished boat looking sweet dudes:roflol: