Thanks for all the info. I am considering to build a similar 4' x 4' version.
The Frog: CNC Router
Build in 'Cartesian Style CNC' published by Neil Rosenberg, May 21, 2014.
Frog CNC Router. Inspired by OX and "Routy". Models provided in SolidWorks 2010 format. Currently 24" by 36" working area.
