Hello fellow slot enthusiasts. I purchased a Fly GT40 24hours 1966 #7 and it had some issues like a cracked chassis and some parts that were glued incorrectly so I returned it. It was replaced and this one looks much nicer but I still see there is an issue with the rear of the chassis. It originally appeared that the rear window was not seated properly so I removed the interior and reset the rear window and glued it in place. That was apparently not the issue. There is something binding that is pushing down on the rear exhaust/spring area. Is the rear frame supposed to sit up in the notches of the body? In the photo where the frame meets, Im pushing up on the chassis to hold it up but it springs back down.