I've tried cutting out the ribs by hand but always had problems with consistency. Finally got smart and sent off a dfx. file generated by compufoil to laser arts for cutting. For 2 sets of ribs + materials my total cost was $27.00. Not bad for 2, 89!QUOT! wings the rest of the wood I got from Lone Star Balsa. By the time I got every thing together including carbon I had invested just over $100 (that's not including the jeep Cherokee I rolled on the way back from the LHS for a stinking piece of 1/8!QUOT! ply. Saved the yarn, but thats a whole-nother story.) I really liked the way the wing went together. It actually scared me. Things went according to the plans I had made. But this is just my $00.02 worth. I'll never cut complicated ribs by hand again.


P.S. went this route because the wing had 3 blended air foils. If it was a clark y or similar flat bottom I would have made 2 ply templates and sandwiched the rib material between then went at it with a knife and sand paper.