Flaps might be fun, but with the extremely light 14oz/ft2 wing loading of this plane, the really aren't necessary. You might want to save the servos for use when you get the Dynam Grand Cruiser or this plane:
You can never have too many (Dynam) foamies!
I tamed the nervous nosewheel steering on the SR by drilling a 1/8" hole just slightly inside the one closest to the center of the rudder servo horn and moving the steering rod there. Nosewheel now moves much less and the plane tracks much better on takeoff and landing. The turning circle is a little larger but it will still just do a 180 turn on a double width driveway.