RE: 4*40 Ailerons Trim
BTW, reflexed airfoils have substantially reduced max lift coefficients compared to similar non-reflexed airfoils.
Stalling speed and landing speeds are directly related to max CL. Rig the 4* ailerons up and the max CL is reduced, stall speed increased, and landing speed needs to go up.
Personally, I wouldn't rig those ailerons up.