Well Ive gone through 5 battery packs now (11.1V Lipo) using the new DD tail motor and its still holding up. I hovered a pack though it tonight and it seems to be about as hot as the main motor. Like I said before the DD is a step up from the stock motor for sure.
The 1 problem I have with it is that theres 2 small hex screws that hold the collar onto the shaft that I cant find a hex wrench for. It must be approxamately 1 sixteenth of an inch but I dont know for sure. Maybe a computer shop or radio shack will carry this. My LHS doesnt have 1 that small.. If anyone knows where I can find it lemme know plz.