ORIGINAL: John Redman
I sincerely doubt it is the servo. I sincerely doubt it is the servo horn also. I have seen the dubro horns strip as Bob has mentioned but never a JR horn.
John,
No doubt the JR HD nylon arms are very strong, but I have had two strip in "normal" use. Its difficult for me to see how those nylon arms are up to the task with a brute like the excellent JR 8711 (or 8611 for that matter). Luckly, Hanger 9 makes some excellent aluminum servo arms, that, along with good 4/40 ball links and Hanger 9 Titanium Pro-Links, makes a secure linkage that is worthy of those servos on a high $, high speed, jet aircraft.
I've never had a linkage setup that way fail, and for me, that's cheap piece of mind... [8D]
Bob