Hi all,

Here is my update on the progress on my Lehman:

I've been able to get some surplus metal parts, and now I'm
able to build a frame like Nick Caporossi's Lehman as you can
see on www.webspan.net/~bbarns (thanks Bob). The dimensions
will be about the same as in the Scientific American article.

I think I will stick to the knife edge design, but I have a
question about the knife edge, does it have to be sharp to
function? (in other words, the sharper the better? ).

What material can I use other than a curtain rod?

Best regards,

Marchal van Lare



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