The inside structure of the pack is actually a shower caddie. The "mini power generators" are actually large lawn sprinklers turned upside down, attatched to a piece of 1/4" board, painted and the whole thing attatched to the shelf of the shower caddie.
I used 1/8" tinted plastic sheeting for the skin of the pack surrounding the shower caddie. I drew a basic pattern of what I wanted the base pack to look like, then cut it out on a band saw, sanded and polished the edges, then using a heat gun I slowly bent it into the basic pack shape around the wire structure of the shower caddie. Then I cut and added the other pieces of the pack "skin" and secured them with a combination of screws and small bolts and nuts. The various attatchments and accessories on the sides of the pack are made up of bits of stuff that I found in hardware stores, the computer salvage store and around our Shop. (We have a Thermoforming business) The cloth pack on the front is a large ammo pack I found at the Army Surplus store. The hoses and power conduits from my gauntlets plug into either side of the pack as well.