I built my UCD back in October. ST 90 w/MCP, 7 lbs, 2 oz, CG at 6 3/8". During the past 9 months it's logged way over a hundred flights....and I flew it three more times today. Within the first 20 flights, the CA hinges broke on the rudder, elevator, and ailerons. Great Planes pinned hinges cured that problem completely. When the UCD was fairly new, the firewall and landing gear mounting area were knocked out after a flameout during a hover. Gorilla Glue fixed them stronger than new with no problems since.

I'm no expert 3D pilot either, but I agree with coomarlin and nosram. The UCD is a fun 3D and hovering plane, but it's got some quirks in knife edge and harrier flight.

Descending in an Elevator works well with spoilerons mixed in. And spoilerons help with outside waterfalls too. But spoilerons don't seem to help much in harrier flight. And I haven't found much use for flapperons hardly at all.

After flying my UCD for the past 9 months, I still like it. And for the price, it probably can't be beat in it's size class.