My flaperons are set to about 80% of the down aileron travel. I guessed that the flaps would pitch it down and programmed in a touch of up elevator to go with it and it ended up just right, the approach speed when I hit the landing switch is almost perfect. With the flaps set this way when I move the ailerons the one going down bottoms out if I am using much stick, no problem with that though. Seems to work well, and there is no question that it slows it down, I'd say by a third.

Thanks for the other advice, I'll definitely watch the crosswinds. I've flown my RV-8, as well as quite a few other full scale planes, in crosswinds and it's just a matter of keeping the upwind wing down a bit and keeping the bird straight with a bit of opposite rudder. Any new gear legs I put on would keep the same geometry. I was considering making them just a bit longer though, maybe .75".