All control knobs are poured, drilled, tapped and painted with a white line by hand at POM AUDIO DESIGN :
![control-knob-making](files/control-knob-making.jpg)
![knob-making](files/knob-making-2.jpg)
![line-painting](files/line-painting.jpg)
All Control knobs on the FAIRCHILD 670 mkI and mkII can be adjusted with the help of a metric M2 Allen-Key :
RS Stock number : 609-578
![m2-allan-key](files/m2-allan-key.jpg)
(Supplied with every FAIRCHILD 670 mkI and mkII)