1st The frame
I used a British army issue rucksack frame which fits perfect on your back
and wont scratch your armour, it came in green and had to be sprayed black.
2nd The Boxes !
Well, a little secret, there actually Cat litter trays
i used a total of 4 and bolted them together with the bottom trays (light grey) bolted to the frame.
The rest of the boxes are every day plastic containers, but i did hunt
around to find the right sizes i needed.
The fluid canister i can supply if needed
The radio box is just a plastic container, i drilled sixteen holes and
fitted M5 bolts to create the large circle, the various rings are from
army gas masks parts which i have access too.
So far this project has cost me about £50 ($87) + paints.
If you have trouble finding the right parts just PM me, most of the parts
are very cheap but the cost would be in the shipping.