I also have several Evolution 46's and they are not even close in power to an OS 65LA. They won't swing as big a prop as the 65 nor can they swing that bigger prop as fast as the LA. The OP appears to be looking for an economical Engine to fly a trainer. So unless he is building something other than a 40 size trainer all he needs is a OS 46LA. It is inexpensive, simple to use, will outlast his trainer unless it is destroyed in a crash and if it is he is not out as much money and can start again since he saved money on this first engine.