I have an EMG-JAX system in my Jazz Bass. I do not want the black knobs with the EMG logo on them as shown here, but rather (in order of preference) 1) traditional P-Bass/Telecaster knobs; 2) Jazz Bass knobs; or 3) some other knob. What I can't figure out is what the deal is with the EMG pots. It seems like they have a threaded gold or brass portion above the nut followed by a smooth, split portion above that. What the heck kind of knob fits there? Which ones should I buy? I think the shift is 5mm diameter in the topmost portion. Do I need knobs with a set-screw or ones that are push-on, and does that mean I need to spread out the halves of the split portion a bit? Can I use those things that effectively turn a split shaft into a solid shaft? It's all terribly confusing. Some guidance?