I dun'no mbouwer, I tend to think Hugh was quite the innovator, proposing new ideas for small- scale turbines that could be constructed with basic materials, skills and relatively simple tools and equipment.
I'm not sure that what is best for a large-scale wind farm, where a maintenance crew and a crane are on site to rotate through set interval, pre-emptive component replacements and repairs is also the best fit for the backyard enthusiast found here. Still, I applaud your persistence and I respect an approach that is different from my own.
Regarding the premanufactured units from China, I think I'd need to see more than this Adriaan. It sounds like you had good luck, but this is one 150-watt unit, on how high a tower, in what sort of wind regime? This broad endorsement of quality doesn't sound quite as scientific as what we've come to expect from you.