Not a bad suggestion, Doug.

I have another suggestion/question. I don't own a Mk2, so I don't know the way the knob is constructed. But the knobs you get at Radio Shack have a little laterally-mounted "set screw" to tighten down upon the shaft. What about drilling a hole in the knob laterally and inserting a self-threading screw of some kind?

The Ratshack knobs have an advantage in that the screw has a metal sleeve so you can give it extra torque. So maybe this would be too much for it. This is just a suggestion, I dunno if it would work since I don't know what kind of plastic the Mk2 knob is made of and whether its shape would allow this kind of modification.

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Tony Fabris