Hi and welcome to our forum!
We owned s/v Soggy Paws, a CSY 44 WT up until early 2016, when we traded out for a catamaran. Our autopilot was a CPT.
Many CSY's had them. But the guy who made them kinda went out of business and quit servicing them, so people had bad things to say when theirs didn't work. Around that time, my husband Dave was able to acquire a couple of them at a very low price (one was free), as people changed out to other autopilots. He ended up with 3 usable units, and set things up so he could "hot swap" out one or both of the two parts, while at sea. So if we ran into a problem, we just swapped out and fixed it later.
He figured out how to diagnose and replace the relays that are the usual point of failure, and has posted this info on our website.
CPT since has been acquired by someone else and is now back in business again. They are a good low-cost alternative to the high-cost, overly dependent on electronics, modern autopilots.
Here's our website page on the CPT:
http://svsoggypaws.com/CSY/steering.htm#CPTAnd here's the current CPT web page. I see that the unit there looks different than my unit, so they may have redesigned it... hopefully without messing up the simple design that worked well for us for so long!
http://cptautopilot.com/Now lets hear from others that used a different approach...
Sherry