I think I could spring for a Mitutoyo bore gauge. Sunnen looks out of my budget. And a set of Mitutoyo or older used Starrett outside mics with standards. Could I set up the bore gauge using the outside mics? The last thing I bought new from Starrett was a 6" dial caliper which came with a plastic dial ring that split the first time I used it. I was not impressed. So I'm leaning towards Mitutoyo for my budget on this.
