But officer, I was only testing my jet leading edge flaps mechanical thingy! I am going to have to study your solution carefully. I think I have the concept but I'm not clear on a few things. For one, am I understanding flaperons operating in only one direction to mean they flex from 'neutral' downward, but not upwards? I am also building an F4D Skyray-further along with it than the Su. My wife has some heartburn with the number of servos, etc. I've been buying lately. I have thought about building the LE slats for that too. Therefore your solution would work for that also. I have an 8UAF and the Futaba Techy here said I could have flaperons and elevons/tailerons but I haven't figured it out yet. I have the elevons mixed on Ch's 1 and 6 I believe which is normally the flaperon method, but, I think there are other ways of doing it. In the Su 27 DVD, the plane takes off, climbs vertical, does an inside 90 deg 'loop', rolls over to level flight, all as near as I can see with LE flaps down( max 40 degrees according to the specs I've read).