The fishing line on the top after the epoxy dried at the tip connections was stretched tight on to the canopy.
The CF rod on the bottom did a fair job of removing most of the wing flex, but not in negative g manuvers.
CF is probably overkill for that job.
The leading edge is 1/8"x3/16" balsa, to give a rounded leading edge. Not a fan of square l.e.s
On my E-flite Ultimate biplane I intend to do the same l.e. treatment.