Slightly scaled up so that the full diagonal of the Prusa MK2 bed is used.
Final dimension is 700 x 276mm projected surface 1500cm2.
I printed hollow and filled up the void. foaming epoxy on the wing sides and a milled carbon fiber epoxy mix onto the mid section.
Lay up is 4 x 200GSM each sides
The finished wing is 1.5kg.
Update 28/03/19: works great! a lot of lift and with excellent control, not the fastest ride due to the 1500cm^2 but certainly one of the most comfortable. Perfect for windfoiling on waves.