Oh, yes, I see the 3 thin ropes now that I look closer at the pictures. I give you credit. Adding blades behind other blades can actually help performance because the apparent wind the blades see when moving faster than the wind comes from the side and not so much the front. Look at www.tlgwindpower.com in Kansas of the States for a success story on using very thin aluminum blades. Send me updates on your work or start a website of your own. Contact info is on the lower left corner of my website.