JUst been putting mine together, don't know if any-ones done this but before I glued theleading edge carbon tubes in place, I slotted into them a short langth of alli' rod, bent at the right angle. A real tight fitbut makes for a real stong joint, no way will that break open. Also with the under carrage, I'm adding uprights of 2mm carbon, from the plastic whell hubs, vertically up to the upper wing. I'm then lashing them to the leading edge carbon with kevlar thread and also the lowest hub joint. This stops any upward movement and rearward deflection. Will probably be too strong and then break the wheels off.
Dave