Dual extrusion systems for 3D printers have been around for quite a few years, but the additional cost, complexity, and hassle of printing with them have kept them off the workbenches of most hackers.
I replaced the original Mainboard of a Creality CR-10S 3D Printer with a SKR 1.3 Mainboard with TMC2209 stepper drivers. As I am using Klipper, I needed to write a configuration file to use the CR-10S ...