z_axis_assembly:
Vitamins:
  2 M4 cap screw x 20mm
  2 Brass nut M8
  2 Nyloc nut M4
  2 No2 pan wood screw x 13mm
  4 No6 pan wood screw x 16mm
  2 Smooth rod 10mm x 336mm
  1 Microswitch
  2 Threaded rod M8 x 296mm
  2 Washer M2.5 x 5.9mm x 0.5mm
  6 Washer M4 x 9mm x 0.8mm
  4 Star washer M4 x 0.8mm

Printed:
  2 z_bar_clamp.stl
  2 z_screw_pointer.stl

Sub-assemblies:
  1 x_idler_assembly
  1 x_motor_assembly
  2 z_motor_assemblies