the simplistic chassis photos are included Below.
OK! So I was not able to fit a light source inside the closed shell on chassis.
so I staged the photos lit from the front with my cell phone flashlight.
in addition I surmised that the shell might have some basilar irregularity.
so I have an industrial flat piece of aluminum (a fast track template turned upside down) And placed the shell on it for a movie. Front on, and to the side view. What do you think?
look at the space on the chassis to shell relationship. So there is the screw hole misaligned.
now the same with a shell being pushed down on the chassis. The alignment is improved but not true.
The other end with the shell Firmly pushed down, Right side slightly off the chassis. misaligned hole evident.
next up the shell movie.