I´m chiming in a bit late, but I´ll give you my feedback on your last posted versions:
Thai shot has some tricky lighting, as you already know. The direction of the light doesn´t allow for some of the interesting parts of the a/c to show in full detail, and it also creates contrast between the upper aft part of the fuselage and the rest of the airframe, that takes away some of the appeal of the pic, IMO. On other issues, be careful with the jagged 'Thai' titles and the fin contour, which is a bit heat-hazy or jagged maybe.
Saudi shot is very nice. I like the last edit. What noise reduction program did you use?
On the landing gear shot the exposure is off and it´s a bit blurry, too.
Hope it helps. Good luck with them!
"Faithless is he that says farewell when the road darkens." J.R.R. Tolkien