Dene,
My approach was to get the center forward spar bonded in place and then use the 48 inch ribs to locate and bond the rear center spar. It has to be mounted inside the wing shape and the ribs will tell you where that is. Using Mark Langford's ribs with the humps should make it a "no brainer". That is provided you have the ribs sized and marked correctly. Make sure all four 48" ribs are bolted together when shaping and finished so they are all the same. Take it one step at a time and it has to work, or at least it did for me. As always, your results may vary. :-) Larry Flesner Carterville, Illinois
