[Resurrection] \accidentalStyle for common choir notation

[Alexander Kobel]

Dear all,

I'd like to lift the thread "\accidentalStyle for common choir notation" 
from June-July out of the grave. Unfortunately, I don't have it in my 
inbox anymore, so I need to refer to the horribly url'ed archive

http://lilypond.1069038.n5.nabble.com/accidentalStyle-for-common-choir-notation-td191797.html#a192980
In particular, I'd like to gain new insight why Abraham's idea did not 
work out (also, not for me over here).

Summary: I want to use the piano accidental style in a ChoirStaff, but 
it doesn't work.

My contribution to the rationale (and I'm surprised that this hasn't 
been mentioned in the earlier discussion): Pieces might be pure a 
cappella, but conductors need to lead rehearsals every once in a while, 
and the might want to use the piano for that. And they're elected to 
lead, not to read:
  https://www.youtube.com/watch?v=6zQ55S-DJsM
And there no. 3 of 5 possible options is not always correct... ;-)


Any hints?


Cheers,
Alexander