Ok my 2 penneth worth on a Stab HH120, I have had 1 of these for the past 2 years, I can confirm that the gears inside are metal, from memory 1 of the larger cogs is made from brass
, I took mine apart to grease it up after it had become noisy, my dish is a 1.1m Triax and sits above my gutter in an exposed position, since day 1 the motor has had an amount of play through the gears, to such an extent that in winds the movement even on strong sats causes drop outs on my receivers, I have perservered with my motor as 1) it is quiet when in operation (2) usals is awesome once you have it setup correctly, I have thought of going down the 36v and vbox route but given that I flash images and boxes quite often, I dont want to have to input all the settings again, <<<<<< this is probably the biggest reason for not changing, I know come winter when my dish is moving and pics break up I will be cursing the motor, if only a 36v would be developed with usals I would go down that route.
The stab moving my 1.1 from 45e to 43w is painfully slow, you need to know that you are buying a motor that will have play in its gearing from day 1 and affect your viewing, that said they are easy to setup and will lock sats once you have put your co-ordinates in, when it breaks I will be between a rock and a hard place on my next choice of motor, I had hoped that Stab or 1 of the other Diseqc motor manufacturers would have raised the bar, but alas it would appear not