How can I reuse an outline in a score

[Sebastian Menge]

Hi

I am writing arrangements for accordion and create the score and the
individual voices using \book.

To save effort and give some structure / consistency I want to reuse
certain things like
- time signatures
- \marks

I used an "\outline" consisting of silence and the time signatures and
marks and put it in parallel inside the staff but then the layout gets
wrong, because the "silence" somehow influences the layout algorithm. (see
below)

Is there a more clever way to organize this?

Is there perhaps an introduction on how to write scores for smaller
ensembles efficiently?

Thanks, Sebastian.


%%%%%%%%%
outline =
{
   \numericTimeSignature
   \time 4/4 s1*2
   \time 3/4 s2.
   \time 4/4 s1
   \time 4/4 s1 \mark \markup { \box { 55 } }
   \time 3/4 s2.
   \time 2/4 s2
%%%%%%%%%%

and then


%%%%%%%%%%%%
\book
{
  \bookOutputSuffix  "Akk2"
  \score
  {

    \new Staff
        {
          \set Staff.instrumentName = \akkIIName
          \set Staff.shortInstrumentName = \akkIIShort
          \clef "treble"
          \global
          <<
             \musicAII  \\
             \outline
          >>
        }
  }
}
%%%%%%%%%%%%%%