I can very much envision 3D printing being quite complementary to woodworking, both for stand alone needs and for parts to be integrated into a greater project. I feel the same about laser engraving and obviously the same about CNC since that particular tool is nearly primary in my shop now. For me, it's about "making"...I certainly appreciate traditional woodworking a whole bunch, but I'm very open to all kinds of new tools, techniques and materials that allow creation of both functional and artistic project end results.
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The most expensive tool is the one you buy "cheaply" and often...