Small question I now ride a derailleur sram DH 7 x01 speed. I have a little problem it always loosens and my drop out weakened to the point of breaking the small piece that holds it (the chunk circled in red. Am I the only one?
Loctite the derailleur mount bolt and it should stay tight. Only need blue Loctite and make sure everything is clean before assembling. Let the Loctite cure over night before you ride if you can for best results. I had to do this on my XX1 derailleur to keep it from backing off and breaking that part.