Thanks for this review, which I found after buying 12 or so on ebay...
Well, to be fair, it is a non-flight-related project - a slow moving model of an earth-moving machine. Also, I converted two of the servos to geared motors, so the problems don't really affect those and I can make use of the rather decent drive train - or so I thought.
On some of the servos, I notice a certain slack of the gears already (I am still in the testing phase).
This might be due to me backdriving some of them - stupid of me, I guess - it hasn't yet affected other servos and I am not sure this is the real cause, but wanted to send out the warning to be sure. Will update when I get to test my machine for real.
If anyone has a suggestion for a powerful and rugged servo that is cheap and may be slow: I'm all ears
Cheers
Jens