A preliminary chord dictionary for the 'NST banjo'

Stringing up the new kit banjo (writeup coming soon) with NST intervals for the main 4 strings, I finally sat down and worked through the basic library of chord forms that I had long ago wanted to get around to. For NST guitar players this may look a little funny, with everything down a whole step and a 5th string that I haven't even considered yet, but since I'm after closed forms anyway, this will certainly serve as my own reference for these intervals. For this library, I have operated within the following constraints:

• The banjo is tuned, from strings 5-1, thus: G4-C3-G3-D4-F4. Diagrams should be read accordingly.
  
• I'm looking for closed forms.
• I want one working form for each possible chord inversion. In general, this means each form has a unique bass and treble note; occasionally they swap out interior notes.
• I approached the problem like I did when working through the "all-fifths" four-string group, trying to increment each note on each string first, and only amending a given form if the fingering started to look superhuman.
• Whenever possible, each chord contains all constituent tones (no omitted notes)...this is obviously a limitation on the number of available chords, but I am looking both for a working library, and an approach to chord construction that I can use as a basis for on-the-fly alteration.
• Finally, I used all four strings for each form, simply for the purposes of thinking in a useful box.

Okay then, here's the initial library; it only gets better from here! First, there are the fifths, which are pretty easy to figure out:


Then, there are the four triads. (NOTE: I have not been happy in my search for viable three-string triads on the first three NST strings. Fingerings get ugly; it's just not as elegant as straight fifths or fourths. In the end, I have returned to the four-string model, which obviously works fine.)


Then there are the basic suspended forms:


Then, the meat and potatoes--diatonic sevenths from the Western major and minor keys:


And to round things out, major and minor sixths:


There is a lot more work to be done, for sure, but this should serve as a basis.