I may suggest you look for a Sig Something Extra. It's wings are on a tube and it's about the same size as a hots. It would be easy to modify a kit slightly to look like a Hots.
You talked about knife edge. I don't remember the Hots being great at KE flight but it's been a long time. The Sig is not great at it either. Adding a 1/2" to the rudder length helps a lot on the Sig.
David