Hey Shane,
First off did you get a book that looks like this with your Rickenbacker?:
It has a pretty good explanation of what's going on with the dual trussrod in a Rickenbacker.
If you've got it, I give it a look over in addition to the following.
Rickenbackers have dual trussrod that makes it possible to get your neck dead straight on the bass and treble strings.
Each string has its' own individual tension on the neck for its' respective position whether it be your low "E" or say your "G" string.
Since no 2 strings have the same tension on the neck for a given tuning, having only 1 trussrod is usually going to give you a close to straight neck
because you are going to adjust to the side of the neck that is straight first. In other words a compromise in many cases.
But with a Rickenbacker you can acheive a better result because
2 trussrods make it possible to get both sides of the neck almost, if not, dead straight.
A few tools are needed:
A fine phillips
1/4 nut driver
an 18" machinist ruler or very good quality 18" metal ruler ( most office centers will have someting)
I'll use a stock Rick 360 JG for this:
1. Remove trussrod cover which may require tuning down and pulling strings out of nut to facilitate getting cover off the headstock without scratching.
2. Tune your guitar to what ever tuning you usually play in with the string gauges you normally use. (This is important because we are talking about a specific tension on the neck for a given guitar) Alot of guys are using drop "D" tuning or tuning a the whole guitar down a half step down from the standard "E" tuning.
3. Use an 18" Machinist ruler (best) or a metal ruler about 18" long to check for straight.
I do this between the high E and B string for one trussrod and between the low E and A for the other.
What you are doing is putting the straight edge on the first fret and the last fret and seeing
if the frets in between have a space between the edge of the ruler and the top of the fret(s) usually more about center point, if so, you have an under bow or relief. The ruler will swing side to side in the middle only resting on the first an last fret. If so, you need to tighten the trussrod, clockwise -
half a turn at a time with a 1/4 inch nut driver and check, on that respective side until you get the desired results - usually close to dead straight. Now check the other side.
If you ruler
is rocking in the middle of the neck on the center frets about half way up the neck and you're not touching the first or last fret (sesawing, if you will, on the middle part of the neck on the middle frets) you have a back bow. You need to loosen the repective sides' trussrod counter clockwise - half a turn at a time again with a 1/4 nut driver and check until you acheive the desired result. now check the other side.
Reinstall trussrod cover and check for action height.
NOTE: a neck that is way out of adjustment needs to have both sides gradually brought back, tightening or loosening [depending on if it is back bowed or under bow (relief)] each trussrod going back and forth checking so you bring the neck back gradually without twisting it. This situation may require a pro. But this case is usually on a guitar that is really hard to play - doesn't sound like your guitar.
All in all this is usually a pretty fast adjustment with some careful tweeking.
Check the high string side then the low string side and adjust the respective trussrod then check the center of the neck last.
This job can really make a huge difference in the playability of the guitar the whole way up the neck.
You may need to adjust your action height
after the trussrod adjustment depending on how far out the necks' adjustment was.
After you have the neck adjusted
NOW it's a good time to check for intonation, Nut slot depth with respect to the first fret, and maybe check to see if you have a high fret or 2.
But that's another chapter.
One thing I've noticed for those who bend alot on a Rickenbacker - depending on how your saddle slots were cut/shaped, you may want to flair them out on the saddle to nut side a touch to prevent dampening on the end of the slot during a bend.
Shane feel free to send me a PM or ask any questions for clearification.
You can do this.