Dear Knute,
Here is the best that I could do...but I'm not sure that this is the
most correct solution or that it will look good in context...
This solution looks the closest to what most of the editions I'm looking at do. None of them use the split-stem distributed notes. Thank you for working it out for me.
%%% BEGIN %%%
\version "2.25.19"
\language "english"
\new Staff
{
\time 6/8
<<
\new Voice
{
\voiceOne
e''16
f''16
f''16
\tweak Accidental.X-extent #'(0 . 0)
ds''!16
\tweak Accidental.X-extent #'(0 . 0)
ds''!16
e''16
}
\new Voice
{
\voiceTwo
d''16
g'16
g'16
\once \override NoteColumn.force-hshift = 1.9
\tweak Accidental.X-extent #'(0 . 0)
\tweak Accidental.extra-offset #'(2.8 . 0)
d''!16
\once \override NoteColumn.force-hshift = 1.9
\tweak Accidental.X-extent #'(0 . 0)
\tweak Accidental.extra-offset #'(2.8 . 0)
d''!16
g'16
}
>>
}
%%% END %%%
But it won't work if the music moves around, as is frequently the case with extra-offset.
--