Thanks for all of the feedback. My CG is actually about 3mm behind the aft-most manufacturer recommended location. The plane seems to fly really well, except it requires a bit of up elevator to maintain level flight. I guess it must be something other than the COG making it want to dive. The thing is so much fun to fly compared to my glow model that I really don't mind having to trim in a bit of elevator. Again, thanks for the feedback.