This fin creates a positive pitching moment with rudder on my Abbra and Aggressor. Enough that is basically eliminates the up-elevator mix if you are willing to size it correctly over a couple flights. I use long control horns so 7% mix produced a miniscule movment of elevator - about 1/32". The Aggressor was closer to 1/16".

I remember the little fin you made for the VF3. What really shocked me was the day I flew the anhedral stab. That too made for a dead-ass straight knife edge. It made rollers a piece of cake, but screwed up a lot of other things.

You'll just have to have Ryan try it because there is just a bunch of ifs in the equation now. For instance, if you are already close to zero mix for knife edge, and you add something that creates a positive pitching moment (like on my Abbra and Aggressor) what will that do to the overall flyability?

I didn't think at the time (March/April 07) that just the fin would have a big effect.
Thanks,
Jim