We've had our own discussion on this before.
http://www.habitablezone.com/space/messages/228232.html
http://www.habitablezone.com/space/messages/228226.html
http://www.habitablezone.com/space/messages/228288.html
I repair and maintain excavators for a construction company. It would be fun to somehow contribute to the design of lunar-based machinery. But alas, there is no time because everything keeps breaking...
