(Updated) G502 (wired) reference PCB mounts for custom shell design

I was trying to make a lightweight shell for my wired G502 but I didn't have time to finish my project, but already did the boring part of measuring all the mounts in the factory shell, so this might come handy for those who would like to design a custom shell.

If you use this model I'd love to see your creations!

11-02-2023: fixed the front and midle to accommodate the clear plastic and provide the correct support in the middle

17-02-2023: added an STL of the main PCB mount without side PCB mounts in case you want to get creative with side button placement

06-03-2023: BIG UPDATE

- corrected tolerances

- Corrected screw holes

- Added an STL with all parts combined with correct heights, I figured many of you would just want to put the same layout in a different shell

- Corrected sensor PCB placements

- Added microswitches to the PCB dummy

- BE CAREFUL when inserting screws if you're using PLA, screw in gently, in the case of the sensor, if you brake the scr