This set is my main box. I have a Craftsman stack I also use and various top boxes and chests and a couple bottoms. I suppose I should consolidate it all but it's sort of evolved into use and now it's what I'm used to. Anyway - here is my set.
Top box is a KRA586 from 74
Middle box is a KRA429B dated 77
Bottom box is a KRA377D dated 73 with the optional KRA433 three drawer set in the bottom section and KRA412 shelf.
I have keyed the locks the same and this thing bears a lot of weight. it really is a testament to well designed and build boxes. The drawers are all on slides - no ball bearings on this and yet they are smooth.
Lets see your boxes