Excellent Job!!! Pay him again O'Reilly to play with lego's and write another book!! I love this book, the only problem with it is the black and white photographs. Dave Baum used a rendering program in his book and the models came out with a lot better detail. But I liked this book for its more detailed mechanical designs and notes on the mathmatics of engineering.

Keep up the good work Mr. Knudsen!!

Tim