UPDATE :: I've just completed a short test flight using the rudder trim technique you suggested, Cooper, and I'm very pleased to say my 'directional and leveling' problem disappears after a little switch clicking. The condition still presents itself from time to time; yet, at least now I know what to do to correct it -- and that's a good thing! Ya' see, I don't have all that much experience with high performance aircraft like this one, so every flight... well... every flight enables me to learn something new -- another good thing! I seldom have to trim anything in any of my other GA aircraft, so getting to know a true thoroughbred like this -- one requiring a bit more attention than what I'm used to -- is both interesting and challenging...
Anyway, thanks again for your assistance! Enjoy the rest of your week...
~ B