Thanks to you! If it wasn't for you I would be stuck with torsion springs. Let's take this all the way.
BTW, You could do all 3 DLCJ's and the 1 PGDJ for one arm with one string. It could suck to string but you would only need one tensioner and one spring. Something to think about.
Additionally, somewhere on g+ someone came up with the idea to use separate herringbones (double herringbone if you will) one on each side of the joints. This will make registration much better.
BTW, You could do all 3 DLCJ's and the 1 PGDJ for one arm with one string. It could suck to string but you would only need one tensioner and one spring. Something to think about.
Additionally, somewhere on g+ someone came up with the idea to use separate herringbones (double herringbone if you will) one on each side of the joints. This will make registration much better.