I wish to buy linear shafts at Misumi USA store but I don't know exactly what I need. They have "Bearing Steel" shafts at https://us.misumi-ec.com/vona2/detai...0042688%3a%3aa

I wish to build a larger version of my PowerSpec 3D Pro printer. I want to buy aluminum extrusions, linear shafts, and lead screws from this store. The build volume of my printer is about 9" x 6" x 6" and I would like larger version to be about 16" x 16" x 12". I may want to add parts for a CNC router similar to the one shown at http://www.microcenter.com/product/4...graver_Machine (the motor and bit). Any suggestions? I looked at OpenBuilds website but most of the machines don't have lists of parts that I need to buy in order to build them.