Simon
Another link to go through is the Raymarine forum, lots of posts on Autopilots
https://forum.raymarine.com/index.php
Just post autopilots in the search box
Also when looking at the picture of your display, its not showing any rudder deflection on the horizontal display at the bottom. Do you have a rudder sensor fitted, or was it absolutely amidships when you took the picture. Just spin the wheel and check that you get a port/starboard display at the bottom of the instrument.
I will keep looking to see what i can find in the meantime
Regards
John