Hitec "Karbonite" servo's
I'm planning on using the two that I picked up for throttle only.
I have read one report on RCU of the Karbonite gear snapping off at the spline. I talked with another flyer at the field that said he had one also snap off at the output spline (elevator application, .46 size plane)
For a 1/3 scale, I'd use it for throttle or other non load critical application until it has proven itself.
I also think the resin may be too brittle to withstand shock type loads even though it may be "stronger" than the nylon gears.
I plan to keep my ears and eyes open for other comments as these servos go into the field. Hope to get some more feedback from different applications.