I'm really screwed. I waited and waited to order an Aguilar OBP-3 because I was told they were coming out with a new stacked concentric pot that would make it easier to find knobs. So when I was told the pot was available, I placed the order, requesting the new pot. The preamp arrived. Me, not knowing the difference between a CTS pot and a crockpot, ran the whole shebang over to the tech who was doing the work. I also left a black concentric knob set with him, thinking I had the new pot and that the knob set would fit. Well, Aguilar, it seems, sent me the old long shaft CTS concentric pot by mistake. It's in my bass. I've already sent the black knob set back, thinking it and not the pot was the problem (not knowing that I had the old and not the new pot in the bass). Long story short, I'm up the proverbial creek. I don't want to pay to have yet more wiring work done, nor should I when this wasn't my fault. The old Aguilar pot is sticking out of the bass like a javelin. And I have NO IDEA where I can find a black concentric knob set to fit this enormous thing. Can anybody help me? Please? Aguilar's offered to send me the new pot, but as I said, I just paid to send the black knob set back. I don't want to pay to have more work done. And I'd have to go and rebuy the knobs I just returned. Any information from those who've had this problem would be greatly appreciated.