Originally Posted by Jason B

I went through my shock build last night and was paying very close attention to this in light of this discussion... I encountered the same issue. I'm not convinced it's an issue with the rings, though... it's quite possible that the collars or the bodies aren't the proper size.

At any rate, there's definitely an issue somewhere. Hopefully under load, there will be enough pressure from the spring compression to keep the collars in place, but it's not a long-term solution.