Here are some example gcode I’ve developed. They are mainly to look at as examples of things you can build.
Choke Knob - a friend’s 10HP outboard motor had a broken choke knob. I built him a new knob using Delrin. Note – the speeds in this file are slightly too fast for Delrin.
Servo Ring Adapter for manual Lionel track switch - used to connect a servo to a Lionel switch (points) converting it to an automatic switch (and easily controllable from an Arduino). See my train project.