Homemade Paper Perforation

While I was creating a few prototypes for an upcoming craft show, I accidentally sewed a piece of felt to a piece of cardstock. It was one of those head slapping doh! moments that left me shaking my head. But as I was tearing the cardstock from the felt - it tore so easily - a light bulb went off. If I take out the thread of Β my sewing machine, I have something that will punch holes at an automated rate! And if I change out the needle for a bigger one, I could not only perforate paper, but leather and who knows what else.... Anyway, here's a few pics:

(I found the 2mm to tear the best.)