Last week I was looking through my grandfathers Machinery Handbook (14th edition...the handbook is up to 28th now). What I discovered is that I know the tiniest fragment of the machining trade. In the last couple of years my dad has been able to teach me enough to produce some nice goods that I'm proud to ship and encourage you to pass on for generations but if someone dropped off a set of prints I would be like a deer in headlights. I found a cabinet full of old parts that my dad and grandfather produced over the years and it blew me away, especially when you consider that it was all done manually (will add photos of those to the flickr page soon). Kudos to all of you that understand what d=h+D; in which D= cxc over h and know how to apply it and help keep our world plugging along.