I got all the discs inletted today. Necessary tools in the optivisor, hole punch with light hammer to mark the outline of the disc, fine carving chisels and small tapping mallet.
outline marked in
The edges V cut back
And one of the discs sanded flush and ready for handle finish so I can get them re-etched this week. Unfortunately it was not possible to get a perfect curve to the disc without some marking of the surface to cleaning it off and getting it re-etched was the only option.