Custom Game travel holder!

This is the project where I make a container that can hold all of my game stuff while travelling. I want it to hold D&D maps and characters, miniatures, rulebooks, cards, dice, and my 3ds. I thought about getting an art/map tube for maps and characters (maybe dice), A file box for cards and miniatures if you cut out all of the organisers, a larger box (made by me) to hold rulebooks, my 3ds and larger items that do not fit into the other containers. I want to strap the file box to the bottom of the large box so I can strap the art tube onto the side.