OK, 2 years ago my singer knocked my kickass aluminum necked Vaccaro 5 (like the old Kramers) off the stand and the headstock snapped completely off. You can't buy replacement necks, so I've watched ebay ever since and finally got the exact same bass, even down to the color! The neck and action are perfect. Here's my dilemma. I installed an 18v EMG preamp in my old bass, and it sounded great -- the bass comes stock with an aggressive tone and with the EMG you could put an extra sharp edge on the aggression to slice through any mix. Now that I have this new one, I'm thinking about putting the new neck on the old body, but my fear is that I'll screw up the perfect relief/action I have right now. I guess I'm just not that good/confident in neck adjustments. I do do my own setups, but have never been completely happy with my work on 5 string necks. For whatever reason, when I adjust one of my fivers I'm always thinking the B string was tighter, action lower, etc. before I started tweaking. Anyway, I probably will swap necks today because I have the day off. Do you have any advice on how to make sure everything goes smoothly?