And I say that a midstar 40** NEEDS two servos like a Ford Escort NEEDS a spoiler.
(**or for that matter, most 40 - 60 size planes)

Two servos in the wing is the current trend.

Flapperons can cause tip stall.

I would rather use 1 servo for inboard flaps, and 1 for outboard ailerons, than to use 1 for each aileron.

But then, I never did do "Trendy"

If you want to hook two servos up to a "Y" cord, have at it. But I guarantee that the only difference you'll notice is that when the plane is coming at you, you can see two ugly black things hanging down under your wing.

Oh yea, and your servos won't stay as clean.