V1 is with a printed push pin, printed with small pin up
V2 use a back end of 4,5mm drillbit, cut/saw the drillbit to 30mm length glue it in, printed with the hole down
printed in abs, do not use pla because its in a vehicle(gets too hot) and a steelball pressing into it with a spring deforming the print
The author marked this model as their own original creation.