separating music and tablature information

[Patrick Schmidt]

Hi all,

in order to achieve different guitar tablature editions of the same  
piece of music I experimented with ghost voices consisting of spacer  
rests in combination with tablature information. Unfortunately it  
doesn't seem to be possible to use spacer rests in chord constructs  
such as <s s s>. In many cases I can use 's' instead and define a  
minimum Fret but some chords in higher playing positions contain open  
strings such as <a\5 c'\3 b\2 e'\1>. In this case it would be helpful  
to be able to use <s\5 s\3 s\2 s\1> in a ghost voice and <a c' b e'>  
in the main voice to keep the music and tablature informations in  
separate voices.  As a workaround I could use <a\5 c'\3 b\2 e'\1>  in  
the ghost voice and <a c' b e'> in combination with \once \override  
TabNoteHead #'stencil = ##f in the main voice because otherwise the  
string number indications in the ghost voice interfere with the  
automatic string calculation in the main voice. But then the ghost  
voice also contains some note names and durations which I wanted to  
avoid. Is there a more elegant solution to this problem?

Thanks for any hint!
patrick