I have the noseleg fixed to the servo, so that the servo does the centering. Upon climbout you usually don't have a lot of rudder input, and upon hitting the retract switch the steering servo is disabled.
I don't like the rope-setup with any kind of centering, because it does next to nothing to prevent nosewheel flutter and can get tangled up in some cases, causing a cear collapse on touchdown....

Just my philosophy :-)