Thanks guys, I know the OS91 is a little heavier than the Saito but I have this engine laying around and want to find a suitable home for it. I know I could use this engine but my concerns are raising the wing loading to the point it won't fly well at slower speeds. As for the cowl, throw that ABS crap away and order a fiberglass cowl from Stan's Fibertech.

The thing that attracted me to this airframe is because a fellow flyer has one with an OS70 FS. He says it's a really great flying airplane and I like the scale looks of airplanes. I have build the GP Extra 300S .60 but this engine is a little weak for it. I have a Webra 120 on the way for it. Call me crazy, call me stupid but like the power to get outta anything.

As for the Saito 72, that's a monster for it's size. I have one on a Morris Knife weighing 4lbs 3oz and it's a real blast...