repeating bar numbers and rehearsal marks in frenched score

[Mark Knoop]

I'm creating a full orchestra score and want to have the bar numbers
and rehearsal figures display three times vertically. I'm doing this
using a Dynamics context like this:

  \context {
    \Dynamics
    \consists Mark_engraver
    \consists Bar_number_engraver
    \consists Text_engraver
  }

and then:

\score {
  <<
    \new Dynamics { \bars }
    \new StaffGroup .... etc winds
    \new Dynamics { \bars }
    \new StaffGroup .... etc brass
    \new Dynamics { \bars }
    \new StaffGroup .... etc strings
  >>
}

This all works fine until I use \RemoveEmptyStaves on the intervening
Staffs. Then, for example when the brass are all not playing on one
page, I get two rehearsal figures without a staff in between. 

Is it possible to get the Dynamics contexts to be aware of when the
intervening staffs have been removed?

Minimal example attached and any thoughts appreciated.

--
Mark Knoop

\version "2.17.25"

bars = \repeat unfold 12 { \mark \default R1*2 }
winds = \repeat unfold 192 { c''8 }
brass = \repeat unfold 24 { R1 }
strings = \repeat unfold 192 { c''8 }

\layout {
  \context {
    \Dynamics
    \consists Mark_engraver
    \consists Bar_number_engraver
    \consists Text_engraver
  }
  \context {
    \Staff
    \RemoveEmptyStaves
  }
  \context {
    \Score
    \remove Mark_engraver
    \remove Bar_number_engraver
  }
}

\score {
  <<
    \new Dynamics { \bars }
    \new Staff = "winds" { \winds }
    \new Dynamics { \bars }
    \new Staff = "brass" { \brass }
    \new Dynamics { \bars }
    \new Staff = "strings" { \strings }
  >>
}

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