Gas ring burner knob control

the knob on one of our cast iron ring burners got knocked and lost after one of our camps. After other attempts by some of our other leaders, I decided to take it home and model this basic dial for it. This requires drilling a 3mm hole through the brass with the included guide fileI then used m3 nuts to and m3 machine screws to hold everything together neatly. Bill of materials 3 m3 nuts 2 m3 8mm cap1 m3 12mm capObviously because it is going to be used in a rough environment, I have created a strong profile that has worked well sofar. Any sugegstions are encouraged ;)