It makes sense that an anhedral wing would push a foil in multiple directions and help with roll stability.....besides just a single direction - being up on a flat wing.
Could be....Im just looking for roll stability from the spitfire. The only thing I can think of is anhedral. I will be mounting the 683 to it soon and see how that goes... since Ono foil (which I think has anhedral stab) is not an option anymore.