Thanks! It doesn't look like I'll need to trim much to make it fit but I didn't want to just go hacking at the cheek with a razor saw if I could avoid it.

Thanks for the tip about the fuel tank. I've already had to replace parts for it once as "carefully bend the aluminum tube" apparently translates into "break this piece in half and replace it with brass". I'm going to leave the throttle cable as is for right now until I get the engine mounted and see if it's binding.

Any tips for mounting the engine? The book says to place the engine such that the thrust washer is 1/4" forward of the cheek but this looks like it's much further back than any picture that I've seen. Also, I've seen posts about doing bench runin's for new engines but the book says to do the break in on the plane... Which is best and does anyone have a good link on how to do bench breakins?

Sorry to ask so many questions but I've been holding off on some of these steps for a while because the instruction manual that I have is terrible. With everything from very faded pictures to pictures and text that don't match up to steps that are out of order I've pretty much lost confidence in the book. I did request a new one from the manufacturer who kindly sent me a very nice glossy version of the book with big pictures... for the Avistar Select. That one is an RTF so the manual for it doesn't help me much with the ARF but it does have nice pictures

Thanks again for your time and efforts.