Originally Posted by mike fried
Being nominally 1/4" diameter, another option for customizing could be a setscrewed potentiometer knob (dice perhaps?).
I'd advise against it for several reasons. A knob of greater OD would restrict the downward travel of the arm significantly. For my purposes the whole poit of the Chet arm is to be able to wrap the pinky finger around it for more control.
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