HoggyDog,

You wrote "Please, someone help me understand what aircraft weight has to do with AP function. This (or any other approach-capable) AP should capture and fly the needles much better than I can AT ANY AIRCRAFT WEIGHT INCLUDING 5000 LBS OVER GROSS TAKEOFF WEIGHT!"

May be I'm wrong but consider the weight like a consequence not the cause.
For me the problem is in amount, located in some flags... Where ? that is the question.

Actually I am trying some adjustements (one by one, it's a long process) in air and cfg files parameters. I'm not a guru. I have an empiric approach. So...!

Also the issue is perhaps in an other place because some pilots have this problem, some other have not !?

Regards.

Richard