Hello all. I have a situation that I never really even thought about till I had to rebuild my Saito 65fa. I have been putting together my 82" Great Planes Cub ARF and realized that the timing might be off on the Saito. sitting on the shelf was a bright shiny OS .91 four stroke. YES... I know... it would be way over powered. There is a 3 ounce difference in the engines and they are the same length. I need thoughts and advice. The only worry with the Saito is that I will have to send it off to service to adjust the timing cam. That is the bad thing about rebuilding a four stroke. So what are the thoughts on putting a 91 in the Cub?