Does anyone know how to take apart this remote on/off ASA?

[talfuchre]

This one has a leak - but it appears the pin is linked to the knob on the top. You can unscrew the knob but it simply binds up and will not be unscrewed any more.

I tried a needle nose pliers to unscrew or pull the pin on the inside - no joy.

Any tips besides cursing at it and its mother? I tried that.

TF