can anyone enlighten me on what various collet taper sizes Rivet sold with their series of lathes? And were these proprietary sizes, or standard size tapers such as B&S tapers?? I ended up with one "Rivet" 1/8" collet mixed in with a bunch of collets That came along with a Crystal Lake OD precision grinder I recently purchased from an estate. I have no idea why it was mixed in with the other collets, and am curious if there is a need or desire for rivet collets? I am thinking of making up a set of rivet collets, based on the dimensions of this lone example, but have no idea if they would be of any use to anyone... Thanks Glenn B.