Who make DIY - 3D Printer

• http://www.makerbot.com/
• http://www.reprapcentral.com/
• http://www.makergear.com/
• http://www.3dprintheads.org/
• http://www.phlatboyz.com/
• http://hacknmod.com/hack/diy-makerbot-style-3d-printer-for-250/
• http://3dhomemade.blogspot.com/
• http://wiki.makerbot.com/thingomatic-doc:about-nuts-and-bolts, about T-slot