For a new printer I am designing, the goal was to make the machine look more like a consumer good. I'm very happy with the quality of my Prusa, but it does look very functional.Vents on the side pass the air coming out of the heatsinks down to the parts printing. This was designed for two Qu-BD extruders. Those heatsinks pass the air sideways only. Tests with a flame showed a lot of air getting to the bottom.At the moment, this is printed without any bearings, just 8.2 mm holes in the PLA. It seems to ride very well on the bars. The bronze bushings seemed to seize up. They have very low tolerances.The semicircular ends are a design consideration for the new printer.I will update, once the wiring on the printer is finished and the first print runs completed. A version with Lm8uu bearings will also be made.The digital files for the extruder, used for presentation purposes, are from http://www.thingiverse.com/thing:39299.