That's a great jig design.
I dislike those common ones where each notch is referenced from the next - a great way to accumulate errors ! This one with it's machine made template is far smarter.
Thanks !
I made the first to Mathhias Wandel's plans. I added a rotation counter and 2:1 right angle gears as I couldn't get the wooden gears to work well.
I then found Ed Stiles', which is better in my opinion: http://virtualight.com/?p=1431