How to hack, modify, adapt your iDC follow focus to use with the Panasonic Lumix GH2, GH1

UPDATE: Get the new, specifically designed iDC follow focus for the GH2 HERE.
I really like the iDC follow focus on my Canon 5D2, it is small, simple and can stay on my camera during photo shoots. I also really like my Panasonic GH2, shot a lot with it lately and really missed the iDC follow focus, especially when using Canon lenses. After much tinkering I was able to make it work:

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