Get a longer engine mount for a few dollars and throw that Saito in her, should be easy peasy. You will certainly enjoy the flying alot more when listening to that beautiful music the fourstroke makes instead of that annoying weeeeeee.... sound of the twostroke.

I swap my engines around alot, never seem to decide which I like the best. After flying a twostroke in a certain plane for a while, I swap it out for a fourstroke, and after a while again I swap that one for another twostroke and................on and on

I always use the stock mounts that come with the planes and drill holes to fit both two and fourstrokes. All it takes is to move the fourstrokes a little forward and re-route the throttle linkage some. No big a deal really