Just for reference my Grizzly G1007 RF30/31 clone, (mfd 6-2004) reads .097-1.00” per rev & 2.54-2.55mm per rev of the Z fine feed.
This is on an a IGaging cheap stand alone DRO.
I also have cheap IGaging X&Y DRO, separate 2”x3” screens. Very accurate & reliable.
Although I have never run a lathe with DRO (and I have run many) I have never run a mill without DRO. And would not want to, as DRO makes it so easy.
YMMV, cheers, Steve