I know what you mean by not finding much information about the Datron machine out there. I found a
PDF download (page 7) from their website that had an FEA image of the Z-axis, which gave me some inspiration. I've also watched every Youtube video I could find on that machine in slow motion to get some insight how it's put together. Here are some images I gathered that informed my design:
I have a rather large collection of images that I took ideas from but these were rather significant influences. I have about a week left before my DRO and replacement crossfeed handwheel arrives (it was broken beyond repair when I got the mill). Other than that, the manual mill is ready to go, and I should be able to start making parts for the CNC fairly soon. I've also been disassembling the surface grinder for repairs, as it needs more restoration than the mill did.
When I started this build, I was planning to have more than a few of the parts done by a machine shop. After getting some quotes, I realized that for most of it, it would be cheaper to get my own mill. I was even thinking about doing some Youtube videos documenting the making of this CNC build. I know I enjoy watching the videos of others in their builds.