I'm looking to build myself a Carvin SB5001. I have an LB75 and I love it. I've never built my own bass so I just wanted to make sure of a couple of things. I'm going to equip it with the standard jazz pickups that it comes with. My dilemma is really when it comes to the neck. I'm trying to choose between a Mahogany neck with 2 maple stripes or a 5 piece maple neck. Also, the fretboard is going to be maple. I want my sound to be as "warm" and "smooth" as possible but I also want the bass to be as light as possible. Is mahogany heavier than maple? Will there be any real difference in tone between these 2 necks? Thanks for your input.