That’s an issue with plastic, but how the shell is designed. This thing has been design for injection mold, not for FDM 3D printing ( and I’m not sure that would work for SLA)
The problem are multiples, but let’s take the front part, you can’t print it from, the middle (there the two part are splitting) to top because of the overhang, you could use support for that, but the quality will suffer a lot.
But you can’t also print it by reversing it, because of the small point on the top surface
The top part put on it’s front on the printing surface in cura:
(the red is surface that overhang and would need support to be correctly printed)
as you can see the main front surface is not flush because of the dots
That is because of the two lines next to the screen and the two dots on the bottom
But there is also another problematic part: the thing on the side to close the shell:
This if we start from the front will also be impossible to print correctly.
The back part have less issue, but there is a major overhang too at the top of the shell, and even the screw will have problem to be printed.
The design itself probably have no problem for injection (even if I find the back to be not have enough support against bending) but for traditional FDM 3D printing, it is not going to work well at all…
I will try to do some change on the STL file to make it 3D printable, but that will not be super easy for the locking mechanism…