. The Synergy TT was my first experience with torque tubes, as well, and I was nervous at first too. I have found the gears to be very robust. I was practicing autos and broke the rear landing gear strut and tail fin but didn't realize it because the helicopter wasn't very close to me. Since the tail was sitting low, when I spooled it up, I pretty much ground the tail blades in half but all of the torque tube gears were just fine.
The only time I have broken gears was when I was flying in below freezing weather and the Delrin can get brittle.
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