This table can me customized to 3-4 feet box but will advice to keep in the under 4 feet to factor in the weight. I was inspired my the attached video and I will make the dxf file available on thingsverse and printable. The is distance for your Cnc can be adjusted my moving the top anchor up or down thanks
https://www.printables.com/model/462284-mpcnc-primo-space-saver-table