I now have the three different types of extruders I intend on evaluating for the final robot. Right now, the robot is designed around a Wade’s extruder which came from my RepRap, with a J-Head nozzle. This combination is labor intensive to get working, but I’ve got it down to near bullet-proof reliability. Newer extruders are coming online, and they promise to be cheaper and easier to use, as well as have more features. I intend to do a quick shoot-out of the different options, but that’s going to take a while. I have to design mounts for each extruder to the machine, and then get all wiring done. I also have midterms coming up, so I won’t even think about starting this work until after Oct 7.