Vinsart describes it as a sort of medieval torture thing, I don't know exactly how it works but if you want it, download now because it's only availalbe for 36 hrs.
Update: Received a bunch of emails from readers that they couldn't see anything on Vins site, I found the problem to be Internet Explorer (it won't load the pics but you can still download the template - it's on the bottom right corner). I did some testing and it works on Firefox, Google Chrome, and Safari.
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