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Step 24: Drill the Knobs

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Most dimmer knobs are designed not to be interoperable. In other words, they all have annoying plastic notches in them which prevent them from being put on a generic potentiometer.

To fix this, drill out the mounting holes of the knobs using a 1/4" drill bit. Be careful not to drill all the way through the knob. The goal here is just to hollow out the mounting hole.
 
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