Thanks Jim for the inputs. Umm, I did'nt realise it, but actually there is'nt 3 sections of flaps on one wing half. Just 2, which now doing what I said earlier about parting the wing tip pannels between the ail. and flap section, I can make one longer flap and add a servo at the split like you did. Brilliant I tell you. I'm going to can the torque tube design. But since the flap now will be 18" long I will build up the flap in the traditional manner instead of a flexing piece of 18" long board.

Gunny