I came across this the other day and thought it was pretty entertaining and informative. I have to admire guys like this. I have a fair amount of mechanical knowledge, but I wouldn't be brave enough to attempt something like this if I had the room, time or tools at my disposal!
The first video is disassembling the pack, and the second is adapting it to his Cushman 3 wheeler. They are long videos, so grab a beverage before you sit down to watch them.