I have my first 'Jaguar' a Daimler Sovereign series 2 1979. The malfunctioning master light switch had to be melted out with hot knives and ive just paid $50(NZ) for a new one!The knob is reluctant to come away from the haft of the switch rotor( it's still attached to a lump of steering bits) even whilst the securing pin is being pushed in. Does anyone have any tips on how to remove the knob from the switch without breaking anything?

regards Nicholas Keesing