Schematics and code are posted in the Files section. Had a dial indicator attached to an X axis cobbled together with regular threaded rod, with my PC moving it to and fro. The GCode had it moving +/-0.1 inches, and that is what it did.

I'll check back from time to time while hacking, sawing and sometimes hacksawing things. I'm certain that there will be some updates, improvements, and comments to add to this project.

Onward to the mechanical work! (First will be to replace the pictured threaded rod with Acme thread.)