I got the same plane for Christmas. I have not started to assemble yet but it but it will be ready by time the good weather comes. The engine I will use is the Moki 2.1. In a glow engine I believe it is by far the best choice. The Saito might be fun but not on a aerobatic CAP. I don't see any advantage to the G-45 except for the cheap fuel. When I look at the cost of fuel compared to everything else it does not seem to be important. That's my opinion but I could be wrong.