A useful modification would be for more flexibility for control surfaces. 1. The option to use the VTOL control to deflect control surfaces on a wing or horizontal/vertical stabilizer. This gives the ability to create flaps. It's easily doable via XML editing, but there's a glitch (control surfaces that are on the same wing all assume the same chord) and this should be an easily modified option in the menus. 2. The ability to have multiple inputs per control surface and per rotator, so that a user can build a horizontal tail that can deflect both for pitch and for roll, as real aircraft do.