If there's anything "going on," it's with him, not the bass. Like all of us have said, it's fairly straightforward. I could do it - in fact, I've done more complicated bass electronics swaps than this, and I'm not a pro tech. The fact that he doesn't want to get paid for an easy, routine job seems odd. He could be incompetent, I guess, but that seems unlikely. It really sounds like he just doesn't want to do it, and he's making up reasons to get you to give up. Were you rude to him or something? I can see why he might not think it's the best idea to put the tone capsule in your bass, given that I and others in this thread have expressed it's likely not the most cost-efficient way of improving your tone. But still, why refuse to take your money to do what you want when it's an easy job?