Hopefully I won't get barred from the Festool group for mentioning the name DeWalt, but I built my workbench around my Dewalt storage units, which have built-in drawers, so no need for extra drawer slides and locks. In order to keep the drawer units from sliding out, I made the shelf so that it slides into the carcass. I'll attach a few photos to show what I'm talking about.
I will also add, don't use Home Depot plywood for this! Spent the extra cash on baltic birch. The bottom of mine has already come loose due to voids in the ply. I going to build a 2nd one a tad wider, and probably with shelves. I like the rolling carts from Rigid and DeWalt, and are far easier to carry individually, over leaving in the cart and moving as a unit--too heavy as well. The DeWalt one are the perfect size to me, and like the built in drawers.