Went to the field last night with my UCD and normally rock solid Saito 100. First flight of the night took off and went vertical. Kept climbing then all of a sudden the engine dies. Was able to get it down smoothly. But something is majorly wrong with my engine. It's really tight. Barely wants to turn. It still has compression and the valves seem to be OK. I'm afraid I've had a bearing failure on the front end. I'm gonna send it back to horizon tomorrow and have them service it. So for the next few weeks at least I'm without a UCD. Gonna have to fix the Sukhoi so I have something to fly.