RE: Inexpensive Servos from hong kong
Oh you poor guy :-)
Those are the infamous MG995 servos that have been universally slammed by almost everyone who's ever used one.
Do a search here for MG995 and just read all about them.
Some folks find them okay for buggies but I would never, ever recommend them for use in an airplane.
Unfortunately United Hobby's selective editing of feedback has removed all the bad reviews these servos got -- which kind of makes the review system on that site worse than useless.
Always check the web *before* you buy!