2 hours into construction
It took two hours to cut the ribs, set up the jig and assemble the frame.
Few things to note:
1) spars and leading edge support are spruce. Spruce is much stronger AND does not bow or twist like a typical balsa stick.
2) 1/8 x 3/8 is an overkill for this size model. 1/8 square stock is perfectly adequate and as light as a typical 1/4 balsa stock traditionally used for this type of construction.