[Kenwood] How to remove main tuning knob on TS-940S

[Dr. David Kirkby]

The title pretty much says it all.

I bought a TS-940S yesterday (my second one), but the main tuning knob is 
scratched. But when I bought my first 940S, it had a spare front panel with a 
good condition tuning knob.

So I want to know how to remove the main tuning knob and fit it on another 
radio. I can't see any screw that I would expect to hold a knob in place. I very 
much doubt it is just a push-fit, and obviously don't want to pull it hard if 
its not designed to just push on.

Dave
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