MPCNC M4 nyloc nut case

This is a simple case to fit M4 nyloc nuts into the slots of the MPCNC (Mostly Printed CNC by Allted).

I know there are a few of these out there already, but I had some issues printing them on my Original Prusa i3 MK3 (0.4mm nozzle). In the end I designed this STL in Fusion 360 and had to use Cura to slice it. Slic3r would always give me 2 perimeters, even if I would set it to 1.

This is mainly a reference for myself of an STL that's known to work for me. STEP file is included for easy customization.