Added C1:IOO-MC_LOCK to ALConfigMC.yml which solved the isse with FSS Slow. We should tune the FSS Slow Servo PID coefficients for a better performance.
the C1PSL_SLOW.adl screen is not obsolete. It can be used to change the PID coefficients, engage/disengage the PID loop, monitor the PID script blinker, and monitor FAST actuator value C1:PSL-FSS_FAST. the functionality of this screen has not changed from before.
I've also added a wiki page for scripts documentation.