The macros to deploy and retract the BLTouch probe didn't function for me until I removed the I1 parameter.
https://github.com/railcore/configs/tree/master/duet/sys/config-user%20examples
After some Discord discussion, it appears the I1 is needed if you are connecting the servo to the Duet board on the connector that most of us use to connect to the Duex5. If you connect the server to a PWM port on the Duex5, it appears you don't want the inversion.
I also note that @kraegar did not have the inversion in his deploy and retract macros.