In May, Will and I went to a UKI trial judged by Eric Burknap.  There were three tunnel challenges in his courses that I wanted to set up and work on at home.  It took me more than a month to get around to it, but we finally had a chance to work on them today.  Here are the sequences we worked on.  Each contains the original challenge from the trial, and one of them contains an additional tunnel challenge.  Have fun.