Saw Tri4Sale's query about 3D printers, and it got me to thinking; I'm sure there are many of us that are curious enough about 3D printers and what they are, what they can do, and would one be practical in any of our shops. Perhaps someone on here has a 3D printer that would like to hold a training class focused on the subject. No, not me, I don't know anything about them, but I'd like to.