Dan what I do is after the bowl has been turned and ready for the bottom to be finished is I leave the bowl attached to the chuck. I unscrew the chuck from the headstock spindle. I attach the one piece of the donut chuck to the headstock. I screw the adapter that is shown in my post into the chuck with the bowl. Before I slip the adapter into the tailstock I slip on the other half of the donut chuck then mount the adapter, chuck and donut hole to the tailstock. I then bring the tailstock up tighten it then screw the tailstock until the bowl touches the donut chuck that is mounted on the headstock. I secure the bowl into the donut chuck which is perfectly centered and then remove the chuck from the bottom. The bowl is secured and centered in the donut chuck and ready to have the bottom finished. Hope this helps Dan.
Retirement: That’s when you return from work one day
and say, “Hi, Honey, I’m home – forever.”
To succeed in life, you need three things: a wishbone, a backbone and a funnybone.