I have finished my Aluminum 3D Printer. I posted a photo in "I Made One:. It is running at this moment printing two parts each 190mm long at a speed of 200mm/sec, wow!!
Love it. Thanks for sharing.
I made my own hobbed sleeve out of a piece of brass and I got a geared motor direct from Kysan. I had to order two to get it, so I have an extra one if someone wants one.