This is a portable worktable I made as a base for a project I'm working on. It has lots of storage inside and is very flat, making it a perfect portable base for small CNCs and 3D printers.
Import the STEP files into Fusion 360 or other CAD/CAM software or import the OpenSCAD files into FreeCAD and export to whatever format you want. You'll need 2x bottomtop.step and 4x side.step.
And if you don't have a 4x4' or larger CNC, please consider my Plastic Monstrosity ;)