Bruce isn't the only person from OHJ here :) I'm Christopher Olah, the author of the "Producing Lenses with 3D Printers" article.

I'd be happy to answer any questions about my article, surfcad, ImplicitCAD, Malthus, 3D printed vacuum cleaners, and any questions about my other projects or 3D printing in general.

Hey, I'm the author to the article "Producing Lenses With 3D Printers". It was originally in LaTeX and I think it looked a lot better that way. You can get the original PDF of it here .

I'd be happy to answer any questions about it, surfcad, ImplicitCAD, Malthus, 3D printed vacuum cleaners, or any questions about my projects or 3D printing in general.

(Essentially resubmitting my previous anonymous comment since I reset the login for this account and no one sees Anonymous Coward posts.)

It's good. I'm going to have to disagree with you on it being overrated. It's dense and long but it has lots of good things. I've learned a lot, despite only having started reading it recently.