If it would help to turn the outside of the feature ring first, you can move the bumpers of your Cole Jaws towards the center a couple holes so that the bumpers will be on the inside of the ring. Then expand them to center the ring (not too much pressure) and then bring up your tailstock with the plywood circle on a live center to hold it against the Cole Jaws. You can then turn half of the outside of the feature ring and then turn it around to turn the other half.