What you need:

• At least two Ikea Lack tables
• Reasonably strong magnets (change the OpenSCAD files to adapt the printed parts to the proper sizes)
• 500x500 mm plexiglass panels for each side. I used 1.6mm panels.
• Optional: a fan, venting hose, and sealing strip

Assembly

• When assembling the tables, make sure that the legs are attached really tightly to the tabletop. I screwed them all the way in, and then, when I thought they were properly attached, turned them another quarter or half turn, for a really tight fit. This will help stabilize the whole assembly
• Print out all of the parts (four times lack_foot_top for the top table, four times lack_foot for every other table)
• Glue the magnets into the indents on the printed parts (make sure they're all oriented the same way)
• Stack the tables using the printed parts; everything should just slot together
• Print four attachment brackets for every plexiglass pane
• Mark where on the plexiglass the magnets go, and cut out a small indent where each magnet goes
• Use the attachment brackets to glue the magnets to the plexiglass panes (note the magnet orientation)
• Print cable guides. Cut square holes into all tables except for the top table (use the cable guide for size reference), and route the cables through the hole using the cable guide

Optional

• Use sealing strip to seal the crack between plexiglass and tables
• Print out the fan holder. Use the flat round part to draw a circle on all tables except for the top table, and cut it out
• Attach the venting hose and fan to the fan holder, and slot them into the hole in the bottom table