ORIGINAL: TERMAGATOR
I can see the wings flex alot when you do waterfalls with the Flat Edge. Dont get me wrong the Trident flex's too, but not as much as the edge.
I had the same problem with my prototype, so I redesigned the Edge I'm kitting now. I have two CF tubes in the wing - 5mm at the leading edge and 3mm near the TL. The wing is stiff like 2 by 4

. And because the whole LE if CF, you can run this plane into the pole and the Edge will just bounce off.
Along the fuse there is another 5 mm CF tube. It's the main spine if the plane. No flexing here either.
Look at this video:
[link=http://webs.lanset.com/kenny/edge_540_profile_arf.wmv]http://webs.lanset.com/kenny/edge_540_profile_arf.wmv[/link],
so you will see how that plane behaves:
RysiuM