The OS 46 LA cannot fit the standard NexStar engine mount for several reasons:

1) the engine is too narrow and there is too much play between the engine mount struts
2) the muffler does not fit in the fuselage cutout for the muffler since the engine mount favors the left side of the fuselage
3) the propeller hits the tip of the fuselage since the engine is slightly shorter that the "made to fit OS 46 FXi".

I simply want to use an engine that can fit the standard Nexstar ARF configuration since all the blind nuts, control arm holes, etc are pre-designed perfectly on the plane. I would hate to force the OS 46 LA to fit by making cuts in the fuselage, purchasing muffler extenders, etc.