I have a vintage Graflex upper tube that has some moderate corrosion and wear. I'l try to gently clean up the brushed nickel plating with 000 steel wool, but the beer tab has orange rust on it. I have a replacement beer tab from TGS, and I can see that the original rivet is very precisely crimped so that it sits flush with the inside of the tube. How would one go about removing and replacing this rivet?