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Hmmmm. I'll guess that it takes a skilled tech far less time to achieve the same results than it takes me. (?)
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What's wrong with this picture?
Thanks for the help!! I appreciate it! I change strings on my MIA basses all of the time; low tension to high tension and back, and I have never experienced such a radical shift. I really can't believe how much this neck moved in such a short amount of time. I tightened the truss last night and lowered the saddles. I checked it this morning and it is much better. I need to tighten the truss rod a little more and raise the saddles a little, but I think I am good. Thanks.Hi Drew, I see trying a different brand/type of strings remedied the problem you were having with the DR Legends, but I'm thinking instead of loosening your trussrod you probably should've tightened it instead. If you already know how to do a basic setup by yourself, then sorry I'm telling you what you already know.
If you put the Legends back on, do the same thing as before, let the bass sit a day or two. Then, while you're standing up, stand your bass up right in front of you and look down the neck. Does it look like there's a slight "C" shape to the neck, and do the strings look pretty far off the neck? If so, tighten your trussrod from 1/4 of a turn to 1/2 of a turn. Before you reattach your neck, is there a shim (piece of a business card, or a piece of a matchbook cover, etc) in the neck pocket? If so, carefully remove it, and stash it in your case or somewhere else at your house where you'll be able to find it if/when you need it again. Reattach your neck and let the bass sit a day or two. Then look down the neck again. Has the "C" shape in the neck lessened and does the neck look more flat? Have the strings seem to have raised up off the end of the neck some?
Hopefully that's all you need, but if it seems there's still too much of a slight "C" shape, detach your neck again and tighten your trussrod another 1/4 turn. Wait a day or two and look again. I know doing this is tedious, but you're teaching yourself to do a basic setup. Once the neck has gotten pretty flat, you can lower your bridge saddles some, and your bass will play a lot easier.
I just changed the brand and type of string, and I had to make every adjustment that I posted on my bass, and after 4 or 5 days, I'm getting it's action really dialed in.
I hope this helps.
Yes, apparently!! Now I know that I need to keep strings that are sort of close tension on or wait at least overnight for the neck to settle. I really didn't loosen the tension that much...maybe a little over a quarter turn. Crazy.Big Drew, I have no experience with either string mentioned, but am assuming form the OP that the DR's are (much?) lower tension than the Roto's. What gauge strings were they? how much did you loosen the truss rod?
Thanks for the help!! I appreciate it! I change strings on my MIA basses all of the time; low tension to high tension and back, and I have never experienced such a radical shift. I really can't believe how much this neck moved in such a short amount of time. I tightened the truss last night and lowered the saddles. I checked it this morning and it is much better. I need to tighten the truss rod a little more and raise the saddles a little, but I think I am good. Thanks.
What's wrong with this picture?
I'm with you. If I ever need something beyond a setup, I would go to a tech. In fact, I just bought my 4003 to a local guy this week as I just didn't want to deal with it!I've thought a bit more about your question, hopefully I'm getting your meaning, but here's my reasons for doing my own setups:
1. Compared to Local Techs, who earn their money via piece-work, I'm a lot more careful. This leads to less blemishes on my instruments, which I worked very hard to buy, and I like to take care of my instruments.
2. I can do my setups for free, and setup my bass precisely how I like it, compared to the setups I'd pay to have done, which are more of a "Ballpark Setup". Sure, it takes me longer, but I get the satisfaction of a job done right when I'm finally finished.
3. It's made me a lot more familiar and comfortable to make necessary adjustments to my bass' action. The power Murphy's Law is immense; And a Tech will never be there, or even close by when I'm really in a pinch.
I'm with you. If I ever need something beyond a setup, I would go to a tech. In fact, I just bought my 4003 to a local guy this week as I just didn't want to deal with it!
Learning the old style hairpin rods is not difficult.
Since the neck on your 4001 is straight (I assume you mean it is where you want it to be) then just barely snug up the nuts so prevent any potential rattling of them and/or the rods. I am not sure about their use in adding relief on their own if the neck is too straight (only double acting trussrod designs can do that) and you want added relief for the strings currently on the bass. Try the Half Rounds and see if they provide the relief you want (assuming you are looking for more relief - doctor prescribed). The hairpin rods are designed to hold the neck in the desired position, they do not, in and of themselves, create the relief, trying to do so is what causes the fingerboards to pop or put cracks in the neck.
The way to adjust them properly is to put the desired strings on the bass, and let it sit for a while to see how the relief ends up, naturally. If there is too much relief, loosen the TR nuts fully and gently bend the neck back to where you have the relief you want (there are various ways to hold the instrument to do so). Then snug up the TR nuts but don't force them or over tighten them, they just need to hold the rods in place. The hairpin rods work by expanding/spreading apart near the middle of the neck as you snug up the TR nuts to hold the neck in place after it has been manually "flexed" to the desired position. If you try to tighten the nuts any more it just adds tension and stress to the area near the headstock/nut, because the rods are already fully expanded once the nuts are snug against the spacer bar. They don't work like traditional compression type rods and too many "techs" never learned how this type of truss rod works so they crank on the nuts just like they would on a compression style rod and break things! Actually, even with compression type rods it is better to manually bend the neck to minimize the force acting on the rods and surrounding wood of the neck. The wood structure the ends of compression type rods are "attached" to can be crushed/compacted by the force of tightening the truss rod(s). Don't let the rods do all the work of bending the neck.
Hope this helps.
Hairpin truss rod:
View attachment 1021731
Double acting trussrod:
View attachment 1021722