Thanks, Barry. Trying to improve constantly. UCD's rolling circle is not quite harrier-like. The roll rate at a harrier speed is just too slow, at least the way how I have it setup.

Engine: YS-110
Prop: APC 16x6
Fuel tank @ CG
CG is at like 5.5" behind LE. Could move back more, but then it would cause landing to ascend and would require tail weight. Battery is already above trailing edge. The YS-110 is not the lightest engine that will fly this plane well. I had a Saito 100 in there before, and it balances the UCD better.

I am at Detroit area, which should be about 150m (500 ft) above sea level.