Yep, coming along nicely - told you you could do it!
The bay doors are shaped to the contours of the belly, so if you want to turn them upside down, swap sides also, so that they have the right shape.
The figures are looking good, and BTW, one is a pilot, and another a crew member. For future reference, to make the job easier, remove the seams on the figures with a scalpel/craft knife blade, shaving 'backwards'; in other words, scraping the seams away. It's much easier, and more accurate, than trying to sand in confined, small areas.
Good work so far.