Without reading the whole thread, I'd just like to say that I flew this plane on Saturday for a club member. Setup was very simple, with the OS 120 and a pitts muffler. There was NO mixing in the plane. The plane flew awesome! I was shocked how well the plane flew. I flew it til lit ran out of gas doing all sorts of typical maneuvers. The only thing I suggested to the owner was a larger rudder servo to make rolling loops easier.
Thanks,
Jim