Here's a tech tip for you . . . not exactly a Volkswagen tech tip, but it could be VW related:
If you buy a key machine off of eBay, don't assume the motor is running in the right direction! Anyone that's watched me cut a key with the cutter (a "rotory file") running backwards will be amazed at how fast and clean it cuts now that I've got it running in the correct direction!
I wondered why it was bogging down, throwing shavings up in my face and leaving a very rough edge. I rubbed my finger across the cutter tonight and realized it felt smooth in one direction, but would dig in the other. I mounted it on a short piece of 2X6 so I could turn the motor around an now it will cut a key in about a half second vs. about a minute before! :cool: