Hi Scott. I'm using the 120 in my plane as well. Did you experience any difficulties in terms to the engine fitting inside the cowl. I recall one fella had fitting problems with the 150. What sort of muffler extension are you using. Slimeline Pitts perhaps! What about fuel tank. 20 oz in mine. What sort of servos? The provided screws for mounting the engine to the mounts are too big for the Saito. Can someone drill to size. I'll wait for the pictures. Thanks for the report.

Wayne