sorry, forgot to explain each pic. first from left, fixed swash plate. 2nd, adjustable swash plate. 3rd, adjustable swash plate showing the rectangle slot where angle sensor attaches via joint shaft. 4th, swash plate worm gear drive and ball nut. 5th, cutaway view showing inside parts with another good view of what is controlling the angle sensor (small rectangle slot in middle of pic).
in the link, u can scroll down to "Detailed Explanation" which tells, in very technical terms but still informative, exactly how everything works. i have a saved pdf file of the info in the link which was too big to attach. if anyone would like it just let me know. VERY informative if u don't mind a lot of reading.