BEWARE: You need to reuse your pin and pin holder cup.
-print in ASA/ABS 80-100% infill
-side and walls are reinforced (chamfered/filleted)
-use flat head screws (not the cone shaped type) with a washer between the 2 sides and a selflocking nut.
holes are 2.5mm so any screw that size will interlock the 2 pieces (i designed this way to have a better stiffness without using supports while printing)
The author hasn't provided the model origin yet.