After verifying the hardware was fully functional, I decided to do a little 'upgrading'. I wanted to be able to run this mill off of my "Creation Workshop" software, so I took the time to build an interface cable to plug the DB25 connecter of the parallel port to connect directly to an Arduino board. This Arduino is running a fairly stock version of the 'Sprinter' firmware.
As far as Creation Workshop goes, I have been building lots of new versions and adding new features recently. Instead of posting new versions on github, I've been posting to my forum www.buildyourownsla.com for better visibility and faster turnaround.