Tom, Sorry for the late reply - the notification ended up in my gmail spam folder.
The action is fine/standard, and has never needed adjusting except when I changed out to a bone saddle, and had to set the height of that. To measure (at the 12th), I used some coins, but I don't have my notes on that handy. As it's a Yamaha with no truss rod, I sort of set it and forget it. The neck does not seem to budge through the seasons, though I do keep humidity in a narrow range now, but it didn't budge even when I was just relying on in-case sponge humidifiers*. Not sure I ever checked the string height at any other frets, except to play each note up the neck to ensure no buzzing.
I hope that answers your question. If you are up in Chattanooga let me know and you can check it out in person. I'll mark the forum notification as "not spam" so that hopefully next time google won't redirect it as it did this one.
* BTW, that humidification was for the neck, not the top, since the top is laminate. Necks on any guitar - solid or laminate - can shrink in width in low-humidity conditions and get fret sprout, as I discovered with a steel string laminate acoustic. But even that took 10 yrs.