Seeing this talk of 28FSR's inspired me to dig out some old photos of a plane I called the Scavenger as it started out using the bits left over from a Craft Air Scout. I built up a 9% thick wing using 3/8 by 1/8 basswood spars and no dihedral at all. This plane would do it all... snap rolls, knife-edge climb, rolls as soon as the wheels left the runway. It was under 4 lbs and about 52 inches in span as well with the built up wing-tips. Had several of these as they were so quick to build. The wing had no dowels as it nested into the fuse on the leading edge with just a piece of basswood inside to keep it from sliding side-to-side and it had a single 4-40 bolt holding the trailing edge on.