This is the storage system I've designed for my planned Indo China war infantry. They are mounted, in 2's and 3's on 1.5mm thick 40mm diameter plywood disks, with magnetic sheet added. In the Really Useful Box I've put a double-decker layer of 99p metal baking trays (separated by wooden spacers). These should take up to 240 figures, with pace for dice or vehicles in the plastic drawers.
So far I've only finished one company of Viet Minh, but I should be able to base up a company or two of French, soon (figures mustering in the foreground).