Heres a quickie snapshot of my bench. I needed one quick and was in Amarillo at Sams, so I picked up one of those $49 Gorilla Racks. The two pieces visible here are actually one shelving rack. They can also be assembled as shown in two pieces to make benches with shelving underneath. Notice that I turned the shelves upside down so that there isnt that big tall lip. If you want to store bowling balls and dont want them to roll out, you can turn the shelf braces over and have a three inch lip to hold them in.
I had a scrap of 1" plywood left over from a flooring job and I used a piece of it on the bench with the presses. The Plywood is set on the frame with the OSB that comes in the kits on top. I just glued the two together and then screwed the backside to the frame so it wouldnt tip off when I get strong on the compression handle.
I have plenty room enough to put another press if I wanted, and still use the unit on the left for my gunsmith bench. It takes about fifteen minutes to put this thing together, and the total cost is under $60. In case you are wondering, yes it is in the corner of the spare bedroom. No pool, no kids, no pets, and not very much company, might as well have it handy. That's a sheet of Masonite underneath of it so that the shelf legs dont cut the carpet and so if I drop some primers or powder, momma can run right in and vacuum them up before anybody notices. (No comments needed, if you are still married, you already know.)
Bill