although torsion box's are great for assembly tables, they are not strong enough for a bench top imo. I do a lot of heavy work on the bench and couldn't imagine trying to chop a mortise on a hollow core top.
Oh trust me, there have been many points where I've nearly just downed tools and drowned my sorrows but I haven't quite been tipped over the edge (yet)!
Ok, after writing all that I remembered that I had some questions!
I'm planning on gluing and screwing the rabbet joints, is this sensible? Would I be better off gluing & nailing? Or would just glue be enough?
I'm going to pin a thin panel of plywood to the back of each box which I know should help square things up. I haven't bought this material yet, should get and cut this before I try assembling the boxes?