Well after 3 years of "trying" to play bass, played guitar 13 years prior to bass, i finally lowered my action as much as possible. I never really had anybody to teach me technique along with proper setup. I lowered the saddle on my 37th anniversary warwick 4 string thumb as much as possible and it seems to be about 1/8th of an inch from the 24th fret. The lowered action is awesome.. i feel like i have tortured myself for 3 years with such high action. Anyway, I tightened the trussrod for the past 4 days ( that's how much of a back bow my bass had). It still has a bit of a curve towards the top and the relief seems to be fine. I'm getting a slight buzz in the lower register. It's only on the first 2 frets. Should i raise the nut.. or loosen the trussrod? Thanks.