I've been trying to learn the names of the notes on my 19TET electric guitar
fretboard. I think if I don't learn them soon I may not be able to, or at least
I'll find it even harder. Going OK so far.

Once (if?) I have a reasonable handle on the 19TET fretboard I'd like to learn
the note names for my 'third-tone' fretboard (frets 68 cents apart, strings 317
cents apart). There's some question what to call the notes in that case; the
19TET guitar uses the ordinary note names but e.g. C# and Db are on different
frets, but the third-tone notes will need some extra symbols I think.