Heavy-duty Plate Mount for 28mm Tubes

I wanted to build my own table for the Mostly Printed CNC (MPCNC) and decided to build it with 28mm tubes and connectors. In order to mount a piece of MDF I had to design this clamp. The two halves can be printed on their sides without supports. I suggest 3 walls and a minimum of 30 percent infill. Use appropriate wood screws and washers if necessary. Don't overtighten! Don't try to close the gap on both sides.