My preference for animated parts on a CFS Aeroplane are generally the following:
Propeller Blurs with increasing Rotational Speed
Animated Main Landing Gear
Representation of Extended and Retracted Tail Gear
Animation or Representation of Flaps
I generally don't care much about animated control surfaces because although I like eye candy like everyone else, I believe that resources are scarce in AF99 projects and to use them to improve the shape of the aeroplane is better. Aileron, Elevator or Rudder deflection does not convey any useful information about the status of the aircraft while Landing Gear and Flaps do.
Some aircraft normally have asymmetrical colouring on thier Spinners (such as a spiral). On those aircraft, I believe the AF99 model should animate the Spinner as well.
AF99 aircraft use a variable set that is compatible with FS98 but not necessarily with CFS. This doesn't cause many issues iwth user flown aircraft or even with multiplayer aircraft, but AI aircraft seem to suffer a bit. If a part is animated to the engine, it will not display on the AI aircraft. Missing Propeller Blades and the Blur can be tolerated to an extent, but a missing Spinner looks very bad.
I noticed this when working on an earlier project and found that if the Spinner pieces are duplicated, assembled in a certain sequence and displayed "Always", the animated parts will show up on a User flown aircraft but when the animated parts disappear on AI aircraft, the "Always" parts will display.
This is an issue that is fairly easily cured with SCASM, but we will stick with AF99 solutions for this Tutorial and endure what we cannot fix in that manner.