That is probably the file. It’s saying 52 because I do incremental savings and I’m betting I just hit the +button instead of just saving the render scene.
I want to look at blenders export settings and see if I can get a file transfer that isn’t very problematic if you don’t mind helping. I’m getting a lot of double verts right now, and on every file the main landing gear comes in out of position and scale, and the wheels look like footballs. Try rotating the wheels and they get huge then small and distort all over the place. Things like that make me nervous about continuing with the model.