This really looks terrific. I will definitely consider buying as I really would like to eliminate one if not both of the home built racks I have inside of my van. It seems like it's going to be a lot better and a bit less awkward than the similar Stanley thing I was playing with at Menards yesterday. The Stanley system had some deal where it slid backward and the three boxes opened in step-type configuration, kind of tackle box style. I found it was kind of difficult to get it slide back and the whole system didn't feel super rigid. I was disappointed as it's the closest thing to what I've been looking for so far. Perhaps this DeWalt system will be the perfect match.
Are the inside of the larger containers wide open? I was thinking of using a bunch of the mid size ones to put tools in, but I'd like to have a way to keep them secure and not flopping around inside. I read on another message board that you could use something like a 2" rigid foam and cut it to fit, then spray a bed-liner type material over it. Problem is that in my experience anytime I sprayed something onto foam like that it ate the foam.