We have officially begun building the wind turbine. We locally sourced pine for the structure of the turbine, bringing the lumber cost to virtually nothing. We have used a cardboard sonotube (intended for cement pouring) as the blades fixed to two bearings mounted on plywood nailed to the pine structure. What we are not sure of yet is whether the structural support provided by the pine will inhibit the rotation speed of the sonotube. The turbine is currently about six feet tall. I plan on posting more photographs and sketches after the initial test of the blades.