I have been using the TwinSync for about two months now and today it saved my plane. I have two planes using the TwinSync, a Hobbico TwinStar with O.S. 25's and a CMP C-160 with O.S. 32's. This morning I was getting ready to fly my TwinStar when I had some trouble in the pre-flight check with the left engine. It seemed to be loading up kinda bad. I re-adjusted the high and low end and all seemed well. I rolled onto the runway for take off and all still seemed well. As I accelerated, both engines came to full power and I rotated for liftoff. Immediately after lifting off the left engine quit. The plane started to roll over but almost immediately the right engine throttled back and I was able to regain control and land the plane. On further examination it was found that a hairline split was present in the fuel line from the needle valve to the carb thus causing the engine to lean out and shut down. Long and the short of it is the TwinSync did exactly what it should do by throttling the running engine back to help regain control. If it had not been for the TwinSync I probably could not have realized what happened right after lift off and reacted quickly enough to gain control and save the plane. I replaced the fuel line and two more flights were without incident. A great product!!!