A/C and Heater control questions

[incoma]

I was re-installing my dash today to get my frame-off to the next level of completion when I found that my top lever (inside/outside/ac/defrost) was broken.. (Kind of explains why my defrost never worked..)

Anyway, I can't figure out how to get this guy apart. The knobs don't seem to want to pop off. I've got the fan switch out, and the chrome bezel off, but can't seem to get much further. I think I've spent about 2 hours on this and can't seem to get anywhere. I couldn't find anythink the FAQ, so I'm wondering if I'm just an oddball??

Does anyone have any helpful hints? Any and all suggestions are appreciated!!!