Messing with my Thumb setup... nut, bridge, myths etc.

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Time for a string change has come and as usual I'm scratching my head about my Thumb setup. Let me preface that I received it brand new from a shop about three months ago and I've been good since... fact is I'm a tweaker, always (over)thinking about how to make my bass in the best shape I can.
Before performing a setup I took note of various measurements and here are some starting point:
1) The trussrod is in perfect position: neck has just a tiny relief, 0.30 mm at 7 fret with capo at first fret and E string depressed at 24th. I know Warwick Setup guide talk about 0.60 but 0.30 is a good number for me (tested on the setup I performed on the +50 instrument I've owned in my playing life, which list include almost every bass brand known to mankind).
2) Strings action is 2.25, 2.00, 1.75 and 1.5 respectively on E, A, D, G string 12th fret. Measurements stay almost constant up to the 24th. No fret buzz anywhere.

The bass came this way. And it stayed this way for three months (kudos to wood stability). I decided not to mess around with it until the first strings change, even if from day one I noticed the string height decreasing from E string to G string, which I'm not a fan at all. I know a lot of players and manufacturers as well recommend doing this but to me this whole thing throw away the purpose of matching the arc of the strings with the fretboard radius and make for an uneven feeling of the strings especially under the plucking hand (for the fret hand it's very minimal because we are talking fractions go millimeters before the string makes contact with the fret but moving through the strings with the plucking hand it's very noticeable... playing with a pic even more).

On a closer inspection I noticed that this kind of setup (performed at the shop, not at Warwick factory) was achieved by a strange interaction between the adjustability of the Just-A-Nut and the bridge. First thing I saw is that the nut height on the G string side is at the recommended height of 0.30 at 1st fret (depression string at 3rd) but on the E string side is way less... about 0.10! Nonetheless no buzz at all....
This uneveness of the nut height is kinda of counterbalanced at the bridge... the E string side of the bridge is way higher from the body than the G side. So we have kind of lower nut/higher bridge on the E side and higher nut/lower bridge on G side. My first thought would be to even each one...

I know... a lot of you would say no buzz and decent strings action is all that counts but, as I said, I'm picky and always in search for the best, smooth, effortless playing experience and I feel there's something that could be done better on this instrument setup. Maybe the guy that performed this setup first set the arc of the strings with bridge saddles, then (to achieve that "desired" height drop on the treble side) lowered the whole bridge on the treble side and finally (to maintain an even strings height) compensate lowering the nut on the E string side??? I dunno... Nonetheless before I dig into it I'm curious of what do you guys think...

Pictures are nut treble side and nut bass side, .... IMG_5692.PNGIMG_5694.PNG
 
I highly recommend a PLEK setup if you have it available where you live. Judging from your username I’d take it it’s Italy?


There are a few stores in Italy doing it. One close to the capital. PLEK is basically a scientifically perfect setup.
 
Aren’t German Warwicks pleked from factory? Is to my knowledge that a plek job should be fine tuned to match the individual preference of the player. On an instrument with no sign of neck warp and perfectly leveled and dressed frets like my Thumb, I’m pretty confident I’m able to do my setup.
 
Aren’t German Warwicks pleked from factory? Is to my knowledge that a plek job should be fine tuned to match the individual preference of the player. On an instrument with no sign of neck warp and perfectly leveled and dressed frets like my Thumb, I’m pretty confident I’m able to do my setup.
PLEK can be done at any time, regardless, to any taste/setup. The setup is still done by hand, but calculated by the machine. The machine will give you a “blueprint” to follow if you wanna do the setup on your own. :)
 
Ok, thanks for your suggestion. Anyway, I’m still interested in hearing opinions about the nut/bridge thing…
 
You say truss rod and action are perfect, so what's the big deal anyway?
I don't understand this post.
 
I said it incorrectly. Truss rod, yes, is perfect. Regarding action I meant that I appreciate the fact that, given the correct neck relief, the strings action is even between frets 12th and 24th... otherwise it should have been sign of bad problems (i.e. ski jump). Nonetheless I would like to lower action and have even string height on all the strings ... and here enter my initial observation about the strange relation between nut and bridge on my current setup.
Please read the third paragraph of my OP.
Given the slanted nut and bridge is impossible to lower the action: those should be straightened first and then it will be possible to lower strings as desired obtaining a nice, even, smooth feel on both playing hands. I know how to do it .... I was just wondering why someone would perform such a strange setup? Does that slant on the nut translate in uneven, excessive pressure of the strings on the nut itself that could result in a breakage? What's the general opinion on having the arc of the strings on a different plane with respect to the arc of the fingerboard (which is clearly what the guy that set up my bass that way obtained) which IMO totally defeat the principle of having the strings matching the radius of the fretboard, which is the first step in adjusting a Warwick bridge?
Hope I made it clear...
 
Nut height and bridge height have completely different functions. Set up the bridge to your preference and once your action is good only adjust the nut if any of the strings are buzzing between your fretting position and headstock.
A nut being adjustable in my opinion is obsolete luxury anyway if an instrument was designed and built correctly.
 
Ah, I understand the question a lot better after your explanation.
My answer would be the same as Marco's, adjust the bridge first with the nut in a neutral position and then raise it accordingly.
 
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