What do you mean about the ring "land"?
Carl and I have been talking in PM's about a source for new rings for a 754. If anyone has any ideas please post up. I need rings that are 52.3mm x 1.6mm (2.06 x .063"). I have tried the "Greek", but anything over 52mm dia, the rings are min 0.079" thick.
I have a 754 all tore down for restoration. It's getting new bearings and seals, paint...the works. Just stuggling finding a source for new rings. I could use the rings in it now. It seemed to have good comp and the rings still have horizontal machine marks on them in places, but with all this effort, I'd like to go new.