Over the years I have amassed (?) a few hundred plated bullets. Most are OK for semi-autos, but I have some revolver diameter plated I don't use because they have no crimp groove or cannelure (no need to inform me about taper crimping or roll crimping on the side. BTDT not so hot!) I would like to try rolling a cannelure on some for roll/profile crimping. I would have other uses for a cannelure tool, but new tools are running $130.00+. Did a web search for home made or inexpensive tools, but came up empty. So, anybody have info or have made a home made cannelure tool?