I throughly understand, we all get obsessive idea and as Gigi noted, these are amazing machines and people use them all the time to create one beautiful items including boxes. You just have to know what materials you can successfully use with a drag blade cutter and figure out how to work with those materials to create with. In crafting boxes, you can do that as Gigi said by using material you can cut with your machine and layering it until it is thick enough to work for your needs. There was one project in particular I remember and will see if I can find a link to. I was always amazed at what they did with that project. If I can find it, I will post a link back to it.
Found two from Esther. This first one was the one I was remembering. It uses layered cardboard and paper. It is stunning:
viewtopic.php?f=2&t=6371 and then there is this one by Esther as well:
viewtopic.php?f=2&t=6372 - she used foam core and papers with it.