OK, I'm officially pi$$ed. I'm pretty sure I just screwed up the master link on my new Regina chain and I'm not 100% sure it was all my fault. This was only my second ever chain install and I read all the instructions carefully as well as watched several videos and looked at several threads online. I got the chain all together, the O-Rings (or X-rings if you prefer) installed and the new plate pressed on to the master link until the master link was the same width as all the other links...(or very close. I don't have a micrometer). THe trouble started when I went to "mushroom" the rivets with the chain installer tool. This is a brand new Bikemaster Chain Breaker and Rivet tool purchased locally for...let's just say slightly north of $100. I put the Rivet Tip and the Anvil TIp inside the tool and began to press on the rivets. Much to my chagrin, the only thing that happend was that the rivet mushroomed out on the opposite side of the chain...the side where the Anvil Tip was. It's the rivet on the right side in the photo Trying to understand what happened, it occurred to me that there is no way on earth that the Rivet Tip is sharp (pointy) enough to compress and distort the head of the rivet... no freakin way! However, the Rivet Tip shown on this Youtube video does not appear to be any better http://www.youtube.com/watch?v=Focg9nxyVpc what gives??