[HO455]

I took a punch the same diameter as the head of the rivet and clamped it in a vice. (See photo). I found a roll pin punch (2nd photo) that was about the same size as the small end of the rivet. After marking the regulator (so I knew what side each roller went on) I inserted the rivet through the roller and the regulator arm and had a helper position the arm with the head of the rivet on the end of the punch in the vice. While it was being held there I mushroomed the smaller end of the rivet with the roll pin punch. The spherical shape of the roll pin punch expanded the rivet in the hole so it doesn't turn or wiggle. If this isn't clear I can get someone to help and get picture. It sounds complicated, but it went quick as it only took 3 or 4 whacks on each rivet to attach the roller.