Well, I have cut into the big surfaces and made some new ones inside.

For this I got to try the Rebuild-Nurbs-Surface (Trim Convert) to remove the excessive number of cv's that tags along a trimmed surface. The only criteria for doing this is that the surface must have 4 sides.

Although I try to keep it simple, I also used the stitch tool once.

I'll keep going with the landing gear itself, it shouldn't bee too hard.

Edit:
Me and my big mouth. The thingy has so many (too many) joints, that I'll skip the high precision stuff. It will be pretty precise, just not like 100% functional mechanics.