Yes Yes Yes on the Quad Flaps

Yes Yes Yes on standard servos (have (4) Hitec HS-425s on mine). I'm a little overkill but have Hitec HS-605s on rudder and elevator.

Yes Yes Yes OS FX 91 -- I have the Saito FA-100 on mine, UNLIMITED virtical.

There is only one downside to Quad flaps on this bird. If you fly this plane a lot you will get spoiled by the effortless landings and maybe stall another airplane out of habit. With the CROW activated you almost can't stall this airplane on landing. Stall occurs virtually at the same moment that forward movement ends and then it just drops on its nose rather than a wing.

Alas, I have to go back to flying school to learn how to land my World Models P-40 Warhawk. Two landings and two stalls later and I have to repair my home-made fixed landing gear because they pancaked forward.