Hey! Very well done plans! It's weird.. While wracking my brain trying to figure out how to make cheap, effective slides, I stumbled (by accident) on attaching roller skate bearings to pieces of angle irons, and running them along steel shafting, or better yet, 1/2" metal conduit tucked inside 3/4" PVC pipe, all being supported on bottom by that steel "T" bar,(looks like steel fence posts) on the bed of the mill, or router.
After downloading your plans, lo and behold! There's "my" idea - I swear I had never seen it before yesterday!! Isn't that weird? But man, It works!! Very cool.. Thank you for your hard work and dedication for making the plans!!
(here, I'll put in a cheers smiley for ya! )
-Jeff Thorsgaard