You will need 14 Leg Holders for the CEB. 12 will be used in this step. Save the remaining ones for later. Make all leg holders at once to save time.

Torch a 3/4” hole in the center of one of the faces of the tubing; make sure it's large enough for a 3/4” bolt.

It's not crucial that the hole be centered. It just needs to be somewhere close to the center.