Mostly Printed CNC / MultiTool All the current parts can be found at vicious1.com Nice write up, explains this in more detail  http://www.3ders.org/articles/20150728-ryan-zellars-shares-designs-for-impressive-mostly-3d-printed-...I set out to build a minimal cost CNC Machine with the goal of some basic aluminum capabilities. Not a speed demon but it gets the job done. I am very happy with its capabilities.Wood Demohttps://youtu.be/c8_lJPNWDwA3D Printinghttps://youtu.be/amo8czFC75YDual headhttps://youtu.be/TZso__iMGu8Testhttp://youtu.be/H_HT3gl6_RIHope this helpshttp://www.vicious1.com/Hardware and printed parts available here.http://www.vicious1.com/store/Printing infohttp://www.vicious1.com/blog/parts/The only special tools needed are a hacksaw, and a drill to drill 4 holes.This can be easily expanded to almost any length, width, and depth depending on rigidity required. Shorter lengths = more rigid.Most woods and plastics should be no problem. I test milled Aluminum with a footprint of 23.5in x 32in x 4in. Aluminum works well, I have a lot to learn but did a test cut of 6061 with a 1/8" 2 flute endmill at 15k RPM, .005" step down, 15in/min feed rate. These feeds and speeds seemed conservative.Rough- https://youtu.be/hbdGyGBq8K8