The Feiten "system" is no system at all.
All you need is to file a bit of fretboard so you can move your nut 0.08mm (0.03") closer to the bridge. and then tune and intonate as folows
_______open___12th fret
E_______00______00
B______+01______00
G______-02_____+01
D______-02_____+01
A______-02______00
E______-02______00
Unless you are a seeyer - you won't be able to tell if this "system" has been installed and with Evo having a 3rd neck since the time Steve was suposed to be using this (1996) chancess are he is not using it anymore.
Things to keep in mind:
1. Attack and fretting will make 1-2 cents changes in pitch so this seems like very made up system
2. Unless you are playing clean - 1-2 cents will not be heard by anyone on the planet.
3. You can achieve similar results by tuning the strings to themselves and not to a tuner
4. You need a special and very precise tuner + an
intonation tool to make sure this could be done at all.
5. On a floating trem guitar 1-2 cents offseting is the stupidest thing in the world as the attack, fretting and action will make 2 cents difference every time anyway.
I have absolutely no idea how this "system" got so big but it's nothing new.
Every decent acoustic/classical guitarist will tell you that they tune by ear and often tune slightly flat/sharp certain strings so some chords can ring truer.
Also there's the Earvana compensated nut............and fretwaive.
Bottom line is if you have ANY of these
1. Floating bridge
2.
Electric guitar
3. 8's 9's or 10's
4. Any effects in the chain or even if the gain on your amp is engaged
5. Pick
6. Play only 2 or 3 string chords or pick single strings
7. Use vibrato to express your playing
8. You only hold down the chord when you are strumming (pressure On/Off in coordination with strumming)
or as it happens with most of us - most of these at the same time, any stretched (equaly tempered) tuning system is moot because there are too many other external influences.
So, unless you are an amazingly consistent acoustinc/classical guitar performer do not waste your time with these aftermarket systems, just get a $20 tuner, tune up and then as Zappa said - Shut up and play your guitar.
ilia