Hi TJ:
That's a fascinating article and thanks for posting it. It mentions at the conclusion that there is a following article about Bill Ballenger's model.
This is the follow up article also written by Scott Dayton.
Bill now lives close to me here on Vancouver Island and has quite a few photos of his model. It disappeared for a number of years but with the help of Kurt Van Dam in Chicago we were able to locate the model again.
Hope this might be of interest to anyone brave enough to model this (now) famous paddler.