I would really benefit from a pic showing how to, as it is said: Pry off the cap of the knob with your fingernail....(conc pots)!

You can see the cap slightly off the knob.

Nice pic, Rich!

That looks like the famous Hand Model George Costanza.

I guess I have really thick fingernails, because this never works for me. I end up using the edge of a knife blade (carefully).
 
Man, is this a full service board, or what? Less than an hour turnaround, including photo!

Mike, good eye.  That is in fact George Costanza prying the cap off.  He even did it pro bono.  If he wanted to bust my butt that pic would've been about $15,000 or so.
With all these good eyes looking at it I was sure someone was going to rail on me for the dust on the knobs.  Uh oh.  That was out loud, wasn't it.  Oh well, beat me up, people.  I deserve it.
Rich

hi & 1000 gracie for SUPERinfoPIC on prying. just what I needed. very nice of you to post it so quickly! best regards from sweden/ k aunver