Added rounded corners to some parts to make them easier to print.
Filled some gaps in the X ends to make them faster to print.
D motor bracket lid now one piece again, as PCB now clears it.
Calibration object now includes horizontal nut traps.
Add c14n_stl.py to canonicalise the STL files.
Corrected PLA sample diameter.
Removed feed tube connector, works fine without it.
Removed tube jig as not required in the kit.
Manual updated with new part renders.