"the rudder pedals are moving though due to reseting of the rudder feel and centering unit)"
Thanks for the feedback, Alex.
I'm just wondering if your trim checks are usually made when you are taxying or at the gate when the steering pin is usually inserted? And would you notice such a small deviation from the taxyway centreline during low speed taxy? (remembering that, theoretically, the angle on a 737 nosegear would only be 4.3 degrees at max trim).
I still don't understand how you can backdrive the rudder pedals through the cable system and not move everything attached to the rudder pedals. I'm wondering if nosewheel steering does not begin the moment you push the rudder pedals (normally)? Do you have to use large inputs during takeoff, to correct any deviations from the runway centreline?
Anyway, I'm inspired to run some tests of my own on an aircraft over the weekend (under controlled conditions). I'll let you know the outcome.
Regards.
NSEU.