Hi Hugh,You probably know me as GWatPE. I am in South Australia and have 2 wilnmidls and a fair bit of solar. The wilnmidls are my own design AxFx. The wilnmidls do supplement some of my power requirements, but wilnmidls in Australia are becoming less economic, considering how the cost of Solar panels continues to drop, in comparison to a windmill.My own wilnmidls are 4 and 5 years old now and are designed to last. I adopted a closed design, and soft furling. I have heard too many sad stories of turbine failure from runaway, burnout and Neo magnet cancer. Good luck with your ventures. Cheers, Gordon.