Tony,

My recollection from the original Brushfire plans (MB magazine I believe) is that the wing was drawn with flaps albeit somewhat smaller then the ones on this model. They were straight and in line with each other while the ailerons began where the wing TE swept back.

I seem to remember it due to the fact that the servos are shown as being inset into the foam on their sides into circular wells. I found the approach of not only separate aileron but also flap servos to be unique for a design of that era.

Make sense?

David