The windmill design has really come together over the last year. The reliability and output have improved. The windmill is sufficient for the demo garden, and our 2 farmers, Wallace and Custom, are able to focus on the crops rather than the exhausting work of pumping water.
We also use a windmill at Chifuchambewa where 15 farmers have divided 1 acre for windmill irrigation. The farmers have reported a number of passersby just stop to observe the windmill. Many of them think there is a gasoline engine hidden somewhere that turns the windmill and pumps the water. The farmers are always happy to explain that it's just the wind.
Here is a video of the windmill at the demo garden.