Of course the set screw is backed out. Check your eyes, that's my thumb. What made me post the video is the fact that this was the second motor/mount with the same issue. When I asked them about it the first time it was news to them. Along comes the second motor with the same problem. and now they still say there's not a problem. Thus, my frustration. I've been rc modeling for ten years now. The only reason I'm sharing this is so that maybe someone could avoid a similar frustrating experience. Take from it what you want.