I would like start working with the TM PTO 4. Mainly collecting knowledge how to use it. To get started I obviously need a stepper motor, I'm looking for sth. cheapish like https://www.oyostepper.de/goods-493-Nema-17-Schrittmotor-45Ncm-15A-18-Grad-12V-4-Draden-mit-1m-Kabel-und-Stecker-f%C3%BCr-DIY-C...