[Premium-Rx] Removal of WJ HF-1000 tuning knob advice

[William Watson]

According to all of the docs that I have, there should be no trickery involved in removing the big tuning knob on this radio.  I have to do some repairs necessitating removal of the front panel pcb. So, the knob must come off. 

I have pulled mightily on the knob and it is still stuck on the shaft.  Is there any trick that needs to be performed to make it come off?  I haven't soaked it in anything yet, but I may. Any advice or special incantations?

Joe WatsonW5WBR