I tried the twin tail boom setup on Mongrel. It did the same weird spin-outs as on the Skyhunter. A wing finally broke during one of the crash landings.
Mongrel has since been stripped down and will be rebuilt soon, with the 4 motor/ESC set from the Dji phantom 2 and using the 9.4x5 props on 4S. Wingspan may increase to 72 inches.
The twin tail boom setup will be used, but with larger scratches built vertical stabilizers instead of the little stock ones. I will probably loose what's left of the helicopter frame, and Mongrel will end up being a Mongrel Skyhunter.
Here are the last pics for this one.....
Take..... these broken wings...... and learn to fly again.....