• The little plastic hook thing broke off and the inside ends of the splines were peened over hence needing the big rock to get the left hand arm on again. Other than that they appear to be ok. What was the cause of the failure- pinch bolts not done up tight enough?

  • Exactly the same happened to me earlier in the summer (mine were also silent beforehand). I also assumed bolts not tight enough, so added thread locker to them when I re-torqued them at home. They've been fine since.

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