Hello,

I have a 4*60 ARF with a Saito 100. This is only my second plane, so I am not an expert, but here's what I did. I installed the adjustable engine mount that came with the ARF. I then installed a prop and spinner on the engine and test fit it on the engine mount in a location that provided both the necessary clearance and a decent CG. I also stuffed the radio gear in the fuselage in the approximate location and tested the CG right side up, instead of upside down like you will ultimately do, so that the engine could just sit on the mount and I could test it in different locations.

Travis