I'm so thrilled that Mike Rowe, Dirty Jobs, showed your marvelous structures on his show. Brilliant! I have a 1000 gallon Koi pond that would love a small version of your design as I Winter my Koi at a depth of 5 ft . How luck they would be to have a miniature ball to cozy up in. We live at 1200 ft in the Adirondacks and it gets 15-20 below F. Burr..... I'm sure many shops u here and North would be interested in your products.