Well, as you know, it's designed around the 160 so that's what I used. Reports are that it flies very well. I used the OS metal mount w/ a 3/16" spacer behind it and mounted the engine in 15 or 20 minutes. But then I try to reduce the "hassle facter" as much as possible, so generally stick pretty close to what the mfr recommends.
If you'd like to come south a little you're welcome to take a look at my two. Neither is finished yet. Onr has the engine mounted and the wings finished, and the other one has the retracts installed.
Send me a PM if you'd like o take a look.
Al