Adding Four Feet to My CNC Router Parts 4' x 8' CNC Router

I have added a 4 foot extension kit to my CNC Router Parts CNC router table. It consists of 2 more legs, two 4 foot sides, and their accompanying linear rail and rack gear. There is also one more section of cable tray. The purpose of the extension is the allow me to make an adjustable vertical clamping surface so I can mill the ends and sides of objects. Some of the tools used in this project CNC: http://www.cncrouterparts.com/ Cantilever Clamps: http://amzn.to/1TJmAFx Milwaukee 18-volt Compact Drill: h