that guy used to post on the vertical forum a few years ago
http://www.vawts.net/index.spark?aBID=125317&p=1 he was building a lenz 2 and was looking for help.
windstuff ed was guideing him through construction.
afterwards, we found out he had gone into business.
building lenz 2 copies and kits but had forgotten to mention it to ed.
and didn't mention that it was ed's design in his advertisements.
i let ed know and he and ed came to an understanding.
recently he started using a Chinese extruded aluminum airfoil.
i can't say anything against his product as far as quality,price, or the power it produces
i don't have that information .