Oh yeah I forgot that I added 4 degrees of anhedral to the stab. My calculations fell about half degree short at the increased wing dihedral that this much stab anhedral requires to fully counter. There is a very slight adverse roll couple on knife flight. It takes about 2% proverse roll mix (right rudder=right aileron) to fly straight KE.

Not really wanting to build a new wing, I can eliminate the roll mix by adding wing tip appendages, angled to add dihedral, or add a small cannibalizer to the canopy with dihedral on the sub wing. If anything, it will improve knife edge character. Have not yet decided which way to do it.

Actually have not completely rulled out a new wing. The current wing may yet prove too thick a section for my taste. On the other hand the plane has no problem penetrating even in 25 mph wind which is the condition I flew the maiden flights in. The first flight ended in a dead stick in the wrong place which required considerable drag to land