Thanks for sharing that URL. Growing up in the Black Hills, I remember seeing several of those each year and thought each one was owner built. I had no idea that some of them may have come from a single maker. The most remarkable was called Noah's Ark, on a Chevy pickup cab and made of wood.
Royce (K0RKK) 146.460 simplex
Web page http://spearfishcreek.net/ AIR# 3913 '77' Minuet 6 Metre, behind a 2005 stock Jeep Rubicon with Equa-L-Zer hitch.