So many critical comments, with albeit legitimate critiques, that are missing the point. This is an open source hobby project that is designed to be built with a 3d printer and a few inexpensive off the shelf parts. I have yet to see another rotary table based cnc project like this. does it have some inherent design compromises and short comings? yes, but this is a starting point. The initial reprap project was (an ancestor of this project, no doubt) was also very flawed. This is the starting point of a pretty novel take on desktop cnc and if it gains some traction, will also evolve and iteratively improve.