S2120x Intonation (D string)
I have a strange problem with the intonation on my S2120x. I recently switched up to .010 gauge strings (Ernie Ball), and followed what seemed to be "best practices" described by Jemsite and Ibanez rules for adding springs (from 3 in a .|||. pattern to 4 in a ||.|| pattern), replacing strings, stretching strings, and adjusting trem angle and neck relief.
This is the second time that I have done this on an identical model. The first one I got from Rich (superbly intonated at 9 gauge) and when I did the same thing that I did today, it came out perfectly. Then it was stolen #$%#$%#$%#$%#$%! but I was able to find a slightly used (in mint condition though) replacement (Rich if you had s2120x's in stock at the time, you woulda had my business) for cheap. It came well intonated with 9 gauge strings.
Today's adjustment has resulted in no buzzing anywhere on the fretboard, somewhat low action (enough that i wouldn't want it lower), and perfectly (within 1 cent on my Korg CA-20 (using the input jack rather than the less reliable microphone)) intonated High E B G, pretty close Low A and E (i can probably tweak that a bit the next couple days)
But to my surprise, the low D (at the 12th fret in comparison with the in tune Octave harmonic) started off a good 17 cents flat. Upon unlocking the nuts, tuning the string down, moving the saddle up towards the neck, and tuning back up (and repeating this process over and over again), I was able to get the D string to be 7-8 cents flat with the saddle fully towards the neck.
I am pretty sure i stretched the crap out of the strings, and from what I can tell the guitar is set up well (i suppose i could make the neck slightly flatter and raise the bridge slightly, but that doesn't seem neccesary) and the other strings are in tune and intonated. I am just confused why I can't get the D intonated right.
Though, there is a slight difference between the setup of the two guitars;
s2120x #1 was setup with Elixers (also 10 gauge), and the extra trem spring was taken from my mexican strat who's bridged is locked down.
s2120x #2 was set up with the Ernie Balls, and the extra trem spring is new.
Thanks to anyone who has any input. Oh, and the reason for 4 springs. The trem cavity of this S model seems shorter than other ibanez models like the RG (and its a good deal shorter than my strats)...when I was setting up guitar #1 last year i just ran out of room to screw the springs in. So i added a 4th and unscrewed it all a bit. That was necessary on guitar #1, but i just did it by default on guitar #2. Was that a bad idea? Or rather, even though its set up fine now (and i don't wank on the bar as much as i use it for even vibrato) could that have anything to do with the D string problem? Thanks.