Greetings, I'm an extremely novice bass player and made a very spur-of-the-moment purchase today. I have been using a Fender Jazz bass (Mexican) for the past few years and, although I very much liked the feel of it, I wasn't very happy with the overall sound. I had read online over the past few years that for the type of music I like to play (Tool, RHCP, 311) that a bass with an active pickup might better serve my needs. I'd been considering a SUB Ray for the past year or so which sells for around $300. I played one and liked the tone it produced. By chance, when I went into my local Guitar Center today I saw that they had a used Sterling Ray 34 on the floor for $370. I checked online and was surprised to see that this was more than half the price of a new model. It's in mint condition except that the stock pickup has been swapped out with another brand that I'm unfamiliar with and for some reason, 2 of the knobs have been removed. Was this still a wise purchase considering these modifications? If I wanted to replace the knobs and original pickup, how much would it cost me and where would I be able to purchase them? Any replies/advice are appreciated.