ORIGINAL: mdjohnson
Some people say the metal gear train inherently has too much ''slop'' but the preferred JR 8411 has just that. All a compromise I suppose. Maybe the difference of the metal gear train is in the quality of a higher priced servo (JR) as opposed to a middle cost servo (Hitec) giving credence to the fellow that said ''you get what you pay for''.
I use JR 8411's BUT the "SA" version (DS8411SA). I believe it stands for "Special Application"?? These servos have a nylon gear train and I think this range was introduced for Pattern. I understand they are no longer available, however the Nylon gears from similar JR servos fit.
I don't find the standard 8411's sloppy when new, but they do wear faster, particularly with the vibration of Glow power. With EP, I expect they would be fine, although they are heavier
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I use the Hitec "TG" servos on IMAC as the 'Titanium Gears' give very good life with the vibration and load of a 35%'er. JR's new range of high torque servos have a "special" metal gear train . . so I am keen to see how these perform over time, but they are VERY nice servos although nearly twice the price of Hitec.
JB