Just chuck-up the piece, set tool in the thread & reset dial to the proper line.(I HOPE)
I'm making a regulator for my disco. The wall thickness is .060 using a 28 TPI in aluminum. I thought the thread was cut to the proper depth so I removed the piece. Wrong ! The Aluminum was so shinny, I couldn't see it wasn't cut deep enough. At this point, I don't want to mess it up & have to start over.