Help on single extruder with servo with chimera

Hello..
i need some help if is possible..

I searched a lot but i don't now if is possible or search in wrong way..

I use a mks base 1.4, with a homemade printer based in a FolgerTech i3 2020.

And i want to have 1 extruder with a servo to work with a chimera and Z Dual drive because of the of dual endstop mod...

Video in this link:
dual z axis and dual z stop

If i put 2 extruder and activate Z2 in marlin appears a error that says:

Z_DUAL_STEPPER_DRIVERS requires Z2 pins (and an extra E plug)


If i use only 1 extruder :
error "TEMP_SENSOR_1 shouldn't be set with only 1 HOTEND

Is there any change of work around this?

Thanks.

B)