And here we go. I have a three-story townhouse, no basement, so space was limited. The only place to put a bench is in the spare bedroom I use as an office, so it needed to squeeze between the computers and the bookcases. That left me with a workable size of 4' wide and 30" deep.
I used 4x4s as the corner posts, 2x4s as the bracing, and 1/2" MDF for the shelf and top (double layer on top). The short 2x4s on the side are inset into the 4x4s, glued and screwed. The long 2x4s front and back are held to the posts and the top with carriage bolts, so the whole thing comes apart by removing a dozen bolts.
Note the shiny new Dillon RL-550B with a boatload of accessories. I am hoping to get my first batch of ammo done before the weekend. (I already blew out my first piece of .45 brass while trying to set the powder die... )
By the way, I designed it with Google SketchUp, which is a handy little 3D modeling tool...