I don't know that it's good on wheel steering boats.. the actuator would have to be rather beefy to move all the hardware.
There is not much friction in the steering system, I can grab hold of the rudder an turn it from full starboard to full port with my hands.
The drive unit (actuator) has an electrically operated clutch that is operated by the course computer, as soon as as the AP go into standby or is turned of the clutch disengages. The clutch engages when the AP is in pilot mode.
But I don't actually know. others here may.
I like wheel pilot. my boat has an old raymarine 3000. works well..
It's what is used on most larger sailboats today, the actuator is rather beefy
The linear drive that I'm installing is sized for boats 20' to 45'.
The output force is 400 kg (881 lb) giving me a rudder torque of 100 KgM with a 25cm tiller arm.
I guess your old raymarine is something similar to the SPX-5
Raymarine give these figures
SPX-5 wheel pilot 7,500kg (16,500 lbs) Maximum boat displacement
Type 1 linear drive 11,000 kg (24,000 lb)Maximum boat displacement, Peak thrust 295 kg (650 lb)
Type 2 Short linear drive 15,000 kg (33,000 lb) Maximum boat displacement, Peak thrust 480 kg (1,050 lb)
Type 2 Long linear drive 20,000 kg (44,000 lb) Maximum boat displacement, Peak thrust 480 kg (1,050 lb)