Just a simple buck converter case, has cable tie points, max size is 6mm x 2mm, requires 4 x M3x6mm SHS or BHS.
Buck converter is the LM2596S.
Thank you to LxL3D for the use of the LM2596S Dummy model, which I used to make this case, definitely saved me some time.
I have provided the STEP file just in case someone would like to alter the design.
The author marked this model as their own original creation.