Many moons ago when I came back to the steel guitar , I got a 12 string E9/B6, then heard Bill Stafford on his 14 string E9/B6 with the B6 lok and got one of those.
Bill went off to Saudi and I reworked the PSG with a destination in mind. That destination was to get the most chords I could. The reasoning is that most acceptable melody notes are a chord note, and the chords are played on the beat so having the chord available also give you the on the beat note (most cases).
To be short about it, I ended up with NC = the I neck, P1P2 = the IV neck, and L> = the v neck. This gives I,IV,v necks/chords all on the same fret. Now add the b3,b5,#5,etc. and other variations to each neck via activating changes and you have a fairly complete instrument.
The I chord/neck is a I69, the IV neck is a IV6, and the V neck is a V69 before adding the b3,b5 etc notes.
One way to study this approach is to map the changes as intervals, using each string as a root note for the chord.
One nice thing to be able to do is to harmonize the scale with 3 and 4 tone chords. Another is to be able to use triplets on the same fret wherein the center note is not a chord note...as in E,F#,G# (think the E9 = I neck).
The short form of the finished product is shown at the link below:
http://s75.photobucket.com/albums/i287/ ... TRUCTURES/
Setup/coped =:
A list of the changer intervals using each string as a root are shown at above link:
Example showing the IV neck.
A few of the available chord structures are shown at the above link:
Example of some chord locations:
Or more on the subject may be found at:
http://steelguitarbuilder.com/forum/vie ... 5cd77adab1