I finally finished Useless Machine ll which uses 3 rings instead of Useless Machine which only uses one. It took a while to finish because I was having problems gluing the middle ring together. I originally had used a larger ring that I cut a section out of but it kept springing apart after gluing and clamping so I decided to use a smaller ring that I then added a section to; this was an easier method but created a slight flat spot. The rings also spent a lot of time in the bathroom with clamps on them so that the steam from the shower would shape them properly.
Brian Higbee 