Yesterday when I was about to start shading the Ka-60 i ran into a weird problem I had never experienced before, I couldn’t select certain meshes. When I tried to select the left wheel I simply couldn’t do it, I could still see it so there wasn’t some shader problem and I could still select it in the Outliner but I didn’t see it getting selected in the Viewport, no wireframe or anything. I wasted maybe an hour trying to figure out a solution before I asked my classmate Kim, who had apparently ran into the problem before. He told me to select it in the Outliner and smooth it with the 3 button, and it magically worked. But it could apparently still be problematic in renders so the best way to fix it was to export the whole model as an .obj and re-import it again. After doing that everything worked like it should again.