While investors and the public alike continually hear about the grand potential of 3-D printing at home, the mainstream argument leaves a lot to be desired. How will I ever be able to design a replacement door handle for my 1975 Ford Mustang with no computer-aided drafting skills? The answer to that question and the biggest key to 3-D printing for the average Joe is simple -- 3-D scanning. In the following video, Fool analysts Blake Bos and Isaac Pino discuss the current state of 3-D scanning and what 3D Systems (DDD 3.33%), Stratasys (SSYS 0.52%), and Makerbot are doing to be part of it.