3 Extruders on SKR V1.1, how set up 2 in 1 out (Y piece), and 1 single extruder in latest Marlin?
The latest Marlin, version 2.0.8, allows for multiple extruders (albeit with a single or multiple stepper motors) through a single nozzle, or multiple extruders with multiple nozzles, it is not possible with the current compiler definitions to configure a mixed extruder nozzle concept; this would require more changes to the sources.