Interesting thoughts above, its good to see the range of opinions.
Based on our results and analysis, RP has got it right with understanding the balance physics. There is some furling effect from coning when the machine is running partially stalled, but the main effect controlling power above design wind speed is still stalling.
We are certainly not putting the effort into the development and engineering of this product that we have just for novelty's sake, or to create a pretty gimmick, we are doing it in response to our discussions with both experienced small turbine users and aspiring windmill owners who tell us they want products that are quieter, more reliable, longer lived and more economical.
We won't claim to have 'cracked it' at this stage of our development, but we are seeing some very encouraging results, and getting good feedback from people who see it running.
I welcome any ideas and developments that can help make small turbines contribute positively to a better, more renewably powered world, and acknowledge that there are some very good products out there, particularly for me the Skystream. Now is the time to be developing and innovating to make sure that small turbines become appliances of the future (for suitable sites), rather than staying with a niche of enthusiasts.