Look at these pictures..... THis is the second table that I have built like this. I did a second one because I really loved the first.... The table is constucted completely of steel. The frame is 2x2 tubing with a 1/4" thick steel plate for the top, the table is 2ft x 8ft.... One special note, Magnets work better on thicker steel.... The stronger the magnet, the thicker the steel needs to be.... The biggests magnets that I have in these pictures are so strong that I can not grab the thru bolt and pick them up. I have to use a prybar wedged between the top of the magnet and the wing nut to lift them. These big magnets can be placed ON TOP of a piece of 1/8" BIRCH ply without any holes in it and still hold it down with a good amount of strength.... You can see in one of the pictures how the magnets actually took a warped piece and held it flat to the table even thoough the magnet did not come in direct contact with the steel. This is attributed to the strength of the magnet when used with thicker steel.

Now for building accuracy, I spent more time leveling and straightening the table than I did actually building it. I used pricision equipment to do this.... This table is within .010" from being perfectly flat/straight. It did unfortunately cost a good deal of money to buy the materials, but I have been welding for years so the labor was cheap. I built this table and a steel wing press for about $350 just in materials.... I have lost track of the $$$ value in magnets ( well over $100)