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I have not tried never, but I think it should not be very efficient. I'm curious, so this weekend I'll try to do it and see the results. I live in an area with a high solar irradiance, higher than 5.5 kwh / m2, so if it does not work here, it will hardly work anywhere else.
When I have results I will publish them

It would be greatly appreciated to hear from someone whos tested it first hand thank you for the feedback!

No. But I am reading a book which details a similar, yet smaller still... so I believe that this design of yours should work well. Good luck. SK.