If these work without any slop that would be perfect. I just broke one and used one from my spare tails. I'm not in a hurry now since school has started, so maybe I'll check back when they are in stock and I have time to mess with this stuff again.
These will greatly increase the chances of severe tail damage from minor ground s****es. What happens is that instead of flexing or breaking like the plastic arms they bend and jam up the tail rotor which proceeds to scread your whole tail assembly. I had this happen and it bend the arms on the blade grips, bend the tail rotor shaft, the metal U shaped piece on the pitch slider, and the metal arms themselves. If they had been plastic none of this would have happened.
I dont know how to use this one. the brass bushing is very sloppy and the bearings I think needs to be glued or it lacks a another set of bearings.
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Bought 3 of these and all were USELESS. The side with the bearing is OK, but the hole on the other side is too large and gives a huge total slop. So the original plastic ones are much better even without the bearing.