2.1 - Instead of replicating the threaded rods, could we re-design around them?
As discussed in class we could make a solenoid; however, I think so much precision of the machine is used from threaded rods in the motors that replicating them with another printer would affect how accurate the printer will be.
2.2 - Does having access to a printer like this make you feel more enabled?
Yes it does, I feel that with the use of this it will allow many easier operations being able to be done with a 3d printer instead of milling metal or other methods of manufacturing.
2.3 - Have you considered the extruder as an application? We can create other 'apps' in it's place, with little modification. Does that give you any other good ideas?
I have not, I think that would be a good idea. We could use pencils, stencils, or other things to make the REPRAP machine more usuable. For instance, growth of DNA as discussed in the movie presented in class.
1 - Why can't you use a plastic washer?
You cannot use a plastic washer to replace a metal one. The properties of the washer would decrease drastically, and if was used for tightening a metal nut, it would dig right into the washer. There could be for a plastic washer, but it looked as if they copied a metal washer, for prototyping purposes of a metal washer.