diy lathe for plastic disk audio recordings

• cut acceptable quality recordings (can be lofi, not terribly so)
• repeatability, precision
• budget <$500
• diy as much as possible, off-the shelf when not possible
• crazy good documentation for nontechnical folks (musicians, producers)

• linear actuator moves at the speed, pressure needed
• state machine lowers cutting head, runs cut, lifts head
• control panel

• lights on control panel to get rid of serial prints
• spiral out
• create cutter head
  • experiment with styli, embossing vs. cutting
• experiment with plastics, heat lamp, heated stylus, solvents