Recently updated the hotend to a Bigtreetech 2in1out. No other changes. S3D can only access one of the two extruders no matter which one I select from within the slicer. All worked fine before, and I can’t understand how the software knows what’s on the hardware end, other than the heater element and thermistor. Can anyone offer and suggestions? Is it within the Marlin 2.0 FW? Thanks.