If one uses a light top it needs extra steel, not as much as one thinks. Mine are found field built pieces cobbled together, what makes them the best is location location location and size and shape to some extent. Some day I will find a plate, I just never did and missed a couple. I would like a #/4 or inch no wider than 42 and not longer than 72, take a little. If I need extra have aux stands for that rare event but at that thickness need no top bracing, 4 posts, 4 angle braces to shelf couple angle clamp hangers.
No holes unless I drilled one if needed or made a couple for bending chores if it came up, if a tube for tools sounded like a good idea clamp a piece to it where I wanted and reach under, weld it on. A recept fed from a circuit in floor on each side with a slag bucket on one end.
I could sturdy this up a little but it works. I have a vise on another one slightly smaller but with enough room to set a tool or drill. The flat one was too small and simply had steel welded to it as needed, it word well enough we never fixed it. I would knock the hammer hooks off and make them closer so it held more, make clamp rack full length right off the bat, add another small rack to the drivers side etc, real minor. I like expanded metal shelf.