For medium weight items, I use the wall mount brackets. I have them on three walls of an ancillary room to the garage. What I like about it is I can use 12" shelves on the lower levels and 24" shelves up top.
I used 6"x12" beams for the bench surface. Ridiculous I know, but I wanted a long unencumbered span between the supports. You can put your car on that bench. Don't be jealous of that 1991 Plymouth Colt sneaking into the picture.
By the way - I imported that belt grinder from Oz. One of my favorite tools.
