just a simple cosmetic thing really but practical too! There’s no harm in trying it out yourself because it can always be made undone again. Thought I’d just share it with you:
Now, my Hallmark is equipped with those “lathed” type volume and tone knobs -with two grooves per knob. I find these grooves quite intriguing and today I had a luminous idea to fill them with …rubber washers!

The traction you now get is unbelievable! Out of my ‘collection’ of all kinds of stuff I found just one suitable washer (see pic)...now to try and find three more (thickness: 1.5 mm.) Perhaps bevelled washers are more suitable.
Now I’m wondering if the knobs were ever designed to have just such rubber washers!

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