Gizmo I bet your 36 weighs about the same as the FP. The Magnum 25 weighs almost exactly the same as the FP-40. And there is a youtube vid of an LT-25 with a Saito 40 titled "Don's LT-25" and this guy makes it look easy. Great video.
I am not a speed freak. I just like to putt around in the sky. I like to sit on the tailgate of my truck and trim the plane to fly on its own and just make an occaisional correction while it flys in a big circle around me. I would buy a 4 stroke if I didn't already have a couple of suitable engines on hand already.