I have always enjoyed putting flaps on 40 size airplanes (all sizes for that matter)

With the current trend of using separate aileron servos, I have used Flapperons instead.

I will never do that again. IMHO, separate flaps are MUCH more effective, and if your plane is set up to use strip ailerons with torque rods to control them, setting up flaps is a breeze. Cut the aileron at a point that is about 1/3 of its length. Control the flaps with the aileron torque rods, and for the ailerons, either run flexible push rods from a center servo, or mount a servo in each wing.

Works like a dream.