I just read through all the posts, and when I get through nodding my head about everything people said, this occurs to me.

That "Full Right or Full Left"... too much control... if I was bound & determined to fly that jet, with no throttle control and only full right or left rudder...

I'd decrease the rudder deflection to the absolute minimum, by choosing the outboard link on the rudder control horn, and the inboard link on the servo horn. Maybe even an extension on the rudder link.

Not a cure-all, just a possible remedy for the over-control situation. If you're already there, never mind.

Good luck,
Dave Olson