I have a Regina ORD X-Ring 520 chain. I got the rivet master link.
I have not been able to notice a change in the head of the rivet links no matter how hard I crank down on the rivet tool (Motion Pro rivet tool). The rivet posts are solid and it seems nearly impossible to "mushroom over" the edges. I have tried as hard as I can by hand and without putting an extension on the wrench (which I don't really want to do). I can see a slight depression in the tip of the rivets from the rivet tool, but that is about it.
Has anyone had any experience with this chain or a master link like it? Do you know what the specs are on the flare of the rivet link?