Notes on making mechanical parts stronger.

• Orientation of layers probably most important factor. They pull apart much more easily than lines break.
• ePLA / matt: some websites say it is weaker, some say stronger, than normal PLA.
• Layer height: Most people seem to say thicker is stronger.
• Heat: hotter, and with part fan low / off should give better adhesion.
• Extrusion: overextruding might help.

Much of this is the same as trying to make prints watertight.