People do use Google Drive but I was just thinking aloud about how well ‘Zoom’ views correlate with reality and very large prints.
As far as vertical macro rails go then there is the Velmex Unislide, see this post by Graham:
Robert O’Toole liked them, I think you have to work out a way to mount them but I don’t think it’s difficult. I think they appear used in the US, you never see them here in the UK.
https://www.closeuphotography.com/velmex-unislide
There’s also the Novoflex Castel M, it’s very sophisticated for macro photography (and expensive) but does more than is required for this application.
I was lucky to get a Newport 431 combined with a Starrett micrometer. These engineering sliding stages are beautifully made, no play, bearings etc.