RE: Getting tired of wearing-out servos
That's a good thought and would help but rubber under the mounting tab doesn't entirely isolate the servo from the frame. Vibration will still get at the pot and motor brushes where the head of the screw contacts the tab. A proper grommet is a donut of rubber that takes the servo out of the vibration equation entirely. When I got my first, HS 55s some years ago, I shelved them until I found use for them in a glider. They were intended for electrics and were never meant to be used in aircraft using real engines.
For the HS 55s to be used with engines, the tab design must be changed to accept proper grommets. Are you listening, HiTec?