You got it!
Friction dampens any PIO from vibrations and other movements of the aircraft. Force Trim-ON sets an Attitude Datum until you over ride it by depressing the Force Trim Button and moving the cyclic. Set the Cyclic position you want, let go of the Stick Button and let the SCAS do the work.
Make your minor adjustments using the Pitch and Roll Trim Wheels.
Turns can be made by pushing and Turning the Turn Knob.
In SAS mode the SCAS will only "stabilize" the aircraft but not "Hold" an Attitude.