RE: Hitec HS475 Problems
Karbonite strikes again perhaps?
But to be fair, I would not consider using an HS475 (or any "standard") servo in a 120-size ship -- I think I saw a note on the Hitec site somewhere recommending them for "up to 60 size" which is what I use them for.
If you pull them apart you'll see that some of the gears are *quite* thin and frail, not the sort of thing that will stand the kind of loads a 120-sized bird can deliver.
Karbonite may be stronger than nylon but it's not tougher and I use the 475s (and the digital version 5475) on nothing bigger than a 60-sized bird as recommended. As a result I've had absolutely no problems at all and I think these are a great little servo.