If you use the Saito 50 or 56 you will have to grind away some of the motor mount to make it fit. It's probably worth it.

BE SURE to get the "N" struts on correctly. The longer vertical bar goes at the rear. Got this backwards on my Super Stearman a year ago. Barely could fly the plane enought to land it.

I also learned a lot about balance on that plane. It had a Magnum .46 two stroke on it. I had to put a "Heavy Hub" on the nose. I'm presently putting together the military version using the Saito .56. I expect balance to be easier.

My Super Stearman was a sweet flying plane. Slow, it flew with a nice scale performance. Fast, it was a kick-***** sport plane.