I'm going to share a bone head thing on my last build and I wonder if anything like this happened to you. My last build was the Revell 32 Ford Sedan. I was building it as the fenderless version. Now mind you I am 62 and have build more models than I can remember starting at about 10. Ok, so what I normally do is prep the body and get it in primer first and then go back and start the engine, chassis ect following the instructions ( pretty much ) . I wanted to spray all the body parts as one piece so I glued on the firewall and the rear wheel wells. Got that done and went on with the build. Trouble came when I tried to install the interior. It would not fit with those parts attached to the body. You need to install the interior first. Stupid, stupid, stupid. You would think that after more than 50 years of building models I would have known better. Do you ever get ahead of yourself ????