I use a Rubbermaid tool box...it's fairly large. For smaller parts and screws I use smaller, clear Plano tackle boxes that have alot of small compartments. I manage to fit the smaller tackel boxes w/ parts, screws etc, along with my tools, screwdrivers, pliers, soldering iron, one transmitter, 2 chargers and maybe 6 or so batteries all inside.
I've used larger tackel boxes in the past but this is my favorite box so far. It's quite compact and makes it easy to lug your stuff around from track to home or where ever you drive.