After chasing phantoms and a bunch of intermittent problems, I think they finally fixed the autopilot issues on my plane.

It holds a course, holds an altitude to better than 20 feet, and will make a proper coordinated turn when commanded by the GPS, Will follow a glide slope and a localizer.

This is the original Cessna 400B autopilot coupled to a GNS 750.

A new modern digital autopilot is nearly $100K…

But we spent a month or more chasing issues on the original one, , but now it works as well as anything I can buy today. Took a while to find the issue(s), but it works now, better than it did from the factory.

Such is the fun of owning a 45 year old airplane.  The issues creep up and take time to find.

The flight was smooth and the view was excellent though: We could see for nearly a hundred miles. At all three stops we could see the airports at better than 40 miles.