Polaroid PoGo repair

Polaroids new mini zink printer is about to go on sale soon. Meanwhile many of us are still using our old pogo printers. I was using mine recently and it made a horrible grinding sound and stopped  working. After an Internet search I found this site [http://retromcsmart.com/2011/05/21/how-to-repair-your-polaroid-pogo-printer/] which helped me fix it. I was very surprised to discover that a tiny speck of metal on one of the plastic gears had caused it to jam just like in the photo on the blog site. Miracle of miracles- I put it back together and it works perfectly again.