[C320-list] Autopilot replacement

[B. Stumpp]

After 20+ years my Raymarine ST4000+ autopilot is giving up. 

It has always been a bit jerky and noisy, unlike other units that are more
smooth and quiet.   

Would like to hear what others have installed.

Would also appreciate comments on satisfaction, ease of installation,
smoothness of operation, etc.  

Thanks in advance,

Bruce Stumpp

#647, Adventure

Middle River, Maryland