So I've been scratch building a roll cage for a fire Fighter Mustang II Pro Stock and I am wondering how to get the roll cage to fit tighter to the body as it would in 1:1. I am having difficulty as it is impossible to get measurements from the outside with the interior tub mocked up in the body. Other methods I have tried have been bending beading wire to an approximate shape based on the window and windshield line but have not been successful. I am sure it would be easier if the doors were cut open but thats not were I was heading with this project.