Greetings. I got a GWS DD Tail setup working for my HB2. I toasted one motor by not breaking it in properly. However the second motor works quite well after a 30 minute 1.5-2.0volt break-in. The rudder control is very responsive now with the proportioning turned way dow. But, I've noticed my flight time is only about 15 minutes now, down from 20-30 minutes. Could there be that much loss from the DD Tail Rotor? Or maybe my main motor is on its last legs.