thejml

If it’s not clogged (change your print nozzle if yours is easily swappable), make sure the heat is right on the hotend. Extruder skipping can happen if the material isn’t melting fast enough to have the right viscosity and hence the extruder just can’t squeeze it out fast enough. As a corollary, try slowing down your print and raising the temp a bit.

I love OpenSCAD because not only can I easily parameterize things, and define libraries for commonly used stuff but I can also combine it with my Git setup to get all the benefits of code provenance and backups and change sets and such.