Hi Chris, I have been reading your post lately and am very interested in your wind turbines design. Was wondering why you use stainless steel roller chain,,,,Is it for wear and chain stretch,or for some other reasons?Also was wondering what kind of oil you recommend in the gear case and the viscosity of it?? I am new to this forum, and am very interested in building a ferrite magnet wind turbine using C8 ceramics,1 1/2 inches wide by 4 inches long and 1 inch thick. I am thinking about a 3 phase machine with 16 pole pairs and 12 coils. Was also thinking about making wood blades like they do at Otherpower.com..Are blades like that OK for a ferrite magnet wind turbine. I also am a welder fabricator by trade,and have 2 lathes, a bridgeport. large drill press, ect. Also was wondering if a chain tightener with spring tension might be good for keeping the drive chain tight?? Lots of questions!!!! I really enjoy your posts and your videos too.. Thanks,, Duff Streeter,,Bio Diesel Man