This is just a quick follow up video of my completed drawer slide CNC machine. The total cost for this was around $400. It took a couple months just working on it when I had the time. The stepper motors and driver board (TB6560) were ordered through eBay for $175.
I would imagine that this general design could be enlarged with longer slides and could hold a full sized router.
The next step is to start working with creating some G code and figuring out the cut settings in Mach3.
Thanks for taking a look. (I've posted several videos of the project as it has evolved.)