Looks good!
You could try printing the main gear (sans wheel) vertically (with the door) and use the retraction arm as a support. Maybe some light supports on bottom of the gear door. The doors can probably be 0.5-0.75mm thick
Are you going to print the body as a single piece? I'm trying to visualize the easiest ways to print this; the bottom looks fairly flat, so that can be a single part, with the supports for both the upper and lower halves on the inside. This would preserve panel details and surface quality.
Supporting the wings and tail surfaces will be tough, since they're going to be thin... unless you want to print them vertically.