RE: cheap servos
I use 5245s and I'm generally happy with them even though the gears wear out a little sooner than I think they should. I like that the servos are programmable and I can reduce throws to suit in the servo rather than the transmitter. That way I don't loose resolution. Be careful with them. If allowed to stall near the end of travel they will be done in a couple of seconds. They don't let smoke out but a component on the board fails.
Denis