modular pcb mount

I wanted to change my right now defunctional CR-10S into a a standalone printer running a skr 1.4 and other features, since my SLA printer is not big enough to print one of the many full closure solutions i decided to create a system that is minimalistic , can be screwed on the walls of the printer with the M4 screws and T-nuts and is printable in a reasonable time with a SLA-based printer.
This version is set up for pcb mounts that uses 3mm screws, and have a slot for 3mm nuts.
While i designed this for printing with an sla printer it should print fine on other systems too.

(update changed name of stl-files and added 0.2mm tolerance)
Update 02-04-2021
- Changed height of nut-catch on the pcb mount pieces so i could use smaller m3 screws
- Added a slide in bar, with nutcatch and 2 different types of screw on site additions to make it even more modular and easy to fasten the system to a box