M3D's Michael Armani built a 3D printer business on Kickstarter. Now he's launching his own crowdfunding site, called FitForLaunch, that will vet companies in advance -- and offer guarantees.

M3D is making a bid to bring 3D printing to everyday consumers. Today the company is introducing the Micro, a product it claims to be the world’s “first truly consumer 3D printer.” The Micro ...