The knobs just pull off. I have replaced the knobs on my Source Audio pedals with various screw on knobs (silver Chase Bliss knobs on my C4):Hi all, I was looking into buying a C4 and was wondering if I could replace the knobs with the small ones from fairfield circuitry (Knob, I have some around). On the knobs of the C4 I don't see a screw from the photos online so I'm not sure (I don't even know how I could take them off).


