Thanks AJ. I confirmed the RR motor mount of yours is too big and won't grip on the Freefly rail. Freefly said they contacted you and you had told them I should have no issues. I sent over a video showing that indeed the RR motor mount spins with the reducer/adaptor on the Freefly's carbon rail. I don't know if I got a bad machined unit, but I suspect not since I am sure you all use CNC. What can you all do to fix this? I just dropped a lot of money over the years with you all.