Hi Kieren, Simon, Pierre, Abraham & everyone,
Just a follow up that using \repeatTie does definitely accomplish what I was looking for; I have it integrated into the score now and it's working in all configurations.
A remaining question: I'm guessing there's not a way to lengthen repeat-ties? (Hence why Pierre demoed the work-around of hiding preceding grace notes?)
I tried messing with the X-extent of the LaissezVibrerTieColumn grob ...
\new Staff \with {
\override LaissezVibrerTieColumn #'X-extent = #'(-3 . 3)
} {
c'2
c'2 \repeatTie
c'2 \repeatTie
c'2 \repeatTie
}
... but apparently to no avail.
If anyone has magic available to lengthen repeat-ties, that would be awesome.
(If no magic is available then I think the players will still know what's going on: the symbols aren't as obvious on the page when you first start to read them (as compared to Messiaen's), but I printed out a page and sat it on a stand and I think they will be noticeable enough to work in performance.)
Trevor.