m.gramling,
your deductions from above terminology appears backwards. Drag would normally cause a tuck towards the drag, you describe the effect as reverse from that. Also, I don't think you can really talk about raising and lowering both ailerons very small amounts as creating drag, but rather as changing the wing incidence, which will bring the plane out of trim. Applying spoilerons or flapperons to the wing on a plane has different effects on different planes, all depending on tail moment length, CG, wingincidence placement, etc, etc. Most tail heavy planes (the way we like them the best) will tuck, as if the ailerons were used as elevons, a short tail moment plane much more so than a long t.m. plane like the UCD.
Hey, all testing is allowed here, so why not just go out there and do some flying, turning them aiilerons up and down with the knob on the TX, flipping it inverted, flying knife edge, seeing what it does, and report back here.
Most RC model planes, especially the purpose designed and built funfly planes like these will react different from plane to plane, engine to engine, set up to set up. The main thing is to just go out there and fly the snot out of it, playing with setting, CG, thrust angles, etc., that's what makes it fun.
DKjens