The reviews, on that 56" top box weren't very good, because most complained about the "lack of height" on that top shelf, under the lid. = you can't put sockets up there, or the lid won't close.

I was at a store, 2 months ago, and looked at it, to see what everyone complained about, and that area wasn't very tall at all, maybe 1.5" or something ( I didn't have my tape measure with me) Not that sure, what to do with that area, if it is that shallow. Couple of service manuals, maybe.