Vibrations and Buffeting! Along with Ankors shading would add so much realsitic immersion to this simulation! So when you start the plane and you are sitting at idle, seeing the cockpit edges vibrate a bit until you push the engine to higher rpms would add amazing realism. Also this kind of vibration accompanied by the "drumming" wing noise accompanied by pre-stall buffeting would be a far better (and realistic)indicator of an impending stall, rather than the un-immersing little message at top screen. This coupled with the shadows that Ankor is creating would be amazingly realistic. Then add in some samples of slightly more varied and realistic wind in the wires sounds for when your engine conks, that increase in pitch with speed, and decrease vice versa, will make this sim top notch.

RA.