I have been making some goblets and putting the finish on it before I part it off is no problem,,but after I part it and try to do the bottom,,lol,,that’s where the problem comes in,,i have tried using a block of wood that I turned down to slip the cup into but I just cant seem to get it tight enough,,using the chuck will work but even if you put paper around the it the chuck still bites into the wood leaving a dent,,,any suggestions on how it could be done easier and with out using the chuck,,,,thank you