Brett -
Thank you very much for the thorough explanations.
I just started working with FSX. I decided to go whole hog and invest in a yoke and pedals. They've been wonderful, but like Rude, I've been trying to figure out how to trim the 172 and wondering if it is me, the sim, the hardware, or the 172 itself! I will certainly persist in my practice now that I know that getting trim right is non-trivial.
Again, thanks!