[sdiy] Moog Rogue dissasembly

[nick ames]

Hello,
I recently got a Moog Rogue off ebay, and it still has the foam inside.
It came with the service booklet, and the directions for opening it are 
pretty
clear, but to remove the board it says "Remove all rotary and slide pot 
knobs".
I tried gently pulling on one of them, but it doesn't want to come off.
How do I remove it? Do I just pull harder and/or wiggle it?
Thanks,
Nick Ames