Use only extruder2
I'm Carles and I'd like to know if I can use only extruder 2 ( because I have problems with extruder 1) as extruder1.
Slice for single extruder and select second extruder before print starts. Then the active extruder is used. Eventually you need to modify start gcode to not include T0 in M1047M140 commands for preheating so it uses active instead of T0 for heating.
Thanks, I'll try.