I have no experience working with chains and thangs, and I'm severely lacking in patience and concentration but I sat down a few days ago with 5metres of chain and 200 jump rings and went to work on my own body chain. With the help of a pair of scissors and a pair of pliers it took me about 2 hours and 3 false starts to get it to where i wanted! I measured around myself then freestyled it with the form I wanted it to take and the drape of the chains.. hands down the easiest diy I've ever committed myself to, email if you have questions!
in other news, I have hair again!!!