I have the es2 and 60mm micro nikkor for my d850. I played with it a bit doing negatives against an  xray light box for even illumination. Works well, and fairly quick. Can load a strip, and advance it one frame at a time. You don't have to adjust each shot, can do that in post.
One neat feature of the d850 is the auto positive, but all the images will still need to be tweaked in LR, or whatever you are using. I like the results better for b&w than color.

Overall, it's a decent method, and I think is a reasonable alternative to an expensive flatbed. If your goal is massive studio quality prints though, send them out.