In V3 I added more thickness to the grip.
Knob screw dimensions :-
Total height: 28.2mm
Screw head height: 10.6mm
Screw bottom height: 17.6mm
Screw outer diameter: 22.4mm
Screw inner diameter: 14.4mm
It must be printed with PETG or ABS or a similar heat-resistant material.
The author marked this model as their own original creation.