(just a small rubber band)

It's more than just a rubber band. It's also a new cast knob that has a slightly different design. And yes, I'm sure David would send him the new knob if he asked (assuming that the player isn't on the list of stolen players).

I found that when I used the new knob, I didn't need the rubber washer at all. The new knob design was enough to keep the knob from slipping even without the washer.

However, because Brian's translucent knobs are made of a harder grade of plastic, I need the washer with those.