Auger feeder remix

This started as a remix to make the auger more printable by splitting it axially. The original auger is difficult because of the constant overhang and printing with support is a huge PITA.

The split model prints each side flat and is glued together afterwards (you'll need to flip the halves down on their long sides before printing). This also makes the shaft much stronger. It doesn't take much glue (superglue or epoxy) to join - the joint at the base is most important. I didn't bother gluing each of the screw "threads". A ring is then glued around the base to strengthen the glue joint against the force of the set screw (opening centered on the setscrew hole).

I progressed to remodeling the trough as I didn't want to use melt-in inserts. The motorplate fasteners are now a 5mm bolt and plain nut. I also much reduced the printing time and filament usage by reducing the solid volumes. It's in two pieces, mostly so I could check the bottom half for fit before sinking hours of print ti