Wally, what setup do you use with Z 105mm micro ? I would guess that the longer working distance of the 105mm lens would not work with ES-2 and require some DIY for the setup.
I use a vintage PB-6 slide holder and normally a D7200 with the AF-S 60mm without bellows. I use typically picture control std, and take NEF images. With cold (<4000K) white LED illumination, WB gets color balance good enough right away in most cases, and I can simply extract the full size the jpg from the NEF (dcraw -e) and have slide copy safely on par with a Coolscan image. With the raw, I can conveniently extract detail in deep shadows that one might more forebode than see in the slide projection in a good dark room. The D7200 24 Mpixels is slightly more than the Coolscan image size from a 35mm slide. The D850 can do much more resolution, but there is not that much real detail even in a Kodchrome ISO 25 slide, so the D850 mostly provides better detail on the slide or file "grain".
The Kyoto comparison before is interesting. The scan is as expected, good. The D850+AF-S 60mm performed far below expectations: is it due to overblown picture control vivid and contrast settings ??
I attach a slide copy done with D7100 + AF-S 60mm, the Kodochrome II slide likely was taken with the AI 55mm f/3.5 lens and Nikon F2 quite a while ago.