Wouter just answered that up a couple of posts....
"If a F11 platform still needs 5 sheets of ply, same as the F12'10". The only difference is that at after the building is done you are left with more waste."
Well if thats true then this is one of the disadvantages of an 12"10' boat as you can get two hulls for a 12" boat out of just 3 sheets of ply. So you are saving 2 sheets of ply and a whole bunch of cutting.
The reason being is that (as has been said many times before on this forum) You can get 12ft length out of 1.5 sheets of ply (3mx1.5m).
