It's not like it happens all the time. But now I've got both a Starrett and General unusable with the threaded stub in there. I guess they must have unscrewed a little then fallen on the tip. They're a General #79 & a Starrett 18A. Any clever ideas on how to extract the piece? Since they don't seem to sell parts, I guess my only option is to make, tap and harden the pin and not think about how maybe I should just spend the $30 for a new one and not waste my time.