It's finally starting to take shape! The footprint is roughly 11" x 11". It's still missing the rear reinforcing plates. The lower rear plate will serve as the stepper motor mount for the Y axis and the base plate that holds the Y axis (which is not yet bolted down) is Delrin for now- I'll eventually replace it with a 3/8" thick Mic6 cast aluminum tooling plate.
The Igus linear slides are so nice- just bolt them in place and you're good to go. No need to worry about rails not being in alignment or binding in the system.