So, I recently added some new systems to my now technologically savvy, cardboard armor. My chest plate now has the weight of 8 D cell batteries in the shoulder area (behind the speakers), 4 of which power an AC system in my helmet. I took a computer fan and wired it to the battery supply, and it keeps me relatively cool. Also keeps my visor un-fogged. Unfortunately, I can't really provide pictures, as it has been made completely inconspicuous.