I've seen corner support things in catalogs. Of course I can't seem to find one now to link, but I swear I've seen them at Dadant or Mann Lake or somewhere. And I thought "I need to get me some of those" as I've got at least 3 boxes with extremely loose corners, from prying out frames. I was thinking of just getting corner braces used in construction, like these, and using screws short enough to not go through the hive body. I can get these for about a quarter a piece at the Habitat for Humanity restore in town. (It's like a Goodwill store, but for building supplies.) I'm trying to think of any reasons this wouldn't work and/or problems it might cause...it seems like there's nothing as long as I got the ones that are made for outdoors and wouldn't rust and/or I put them on then give the boxes a fresh coat of paint. And, I might have to pre-drill a hole to keep the wood from splitting when I put the screw in, which I can manage. Any thing you all can think of that would be a problem here?