A little experiment you can try: Well, its gonna cost you a shuttle so pick a cheap one, and make a hole in the middle of the cork and put a smaller stick throught it, so it can spin around it! Now take your Vacuum Cleaner and place the mouth just behind the feathers, straight on, turn on full power at VC (I think you will get the best result if you have two VC, one above and underneath the stick)! Tell me what happens and why?
