I usually set my Ric necks pretty straight, I'll back off just a hair if it buzzes. I just looked the picture of your truss rods and it looks like you have the old style 4001 rods. You need to be careful with those and make sure you relieve the forward pulling string pressure off the neck before you tighten them. The way I do it is:
1. take the truss rod cover off
2. get the 1/4" nut driver in my hand
3. stand the bass up in front of me on a rug so it won't slip with the front of the bass facing opposite me.
4. put the bottom of the bass behind my foot and but it up against the foot, out the back of the body against the knee of the other leg and then pull backwards on the neck just enough to make sure the strings aren't exerting any pressure on the neck, I will then turn them a little and make sure they're both approximately the same tightness and then turn each one anywhere from 1/8 to 1/4 of a turn if they're tight already, if not you want to snug them up and then tighten them the 1/8 to 1/4 turn, if you're not satisfied with the way it plays wait a day and do it again until it's almost completely straight.
If you do decide to bring it to a luthier make sure you tell him those are old style 4001 truss rods and if he's not comfortable working with them find someone who is, you can split the fretboard from the neck down at the nut, the end of those truss rods are on the other side of the aluminum block on top of where they jut through where the nuts are, they do a 180 near the body end and if the block tips the truss rods end will press upward and can pop off the fretboard or at least split it. It's not the end of the world, I did it once and you just glue it with with a good clamp but it's not a good thing to do.