Multi-measure rests and mark collisions ...

[Anthonys Lists]

My usual bugbear ... :-(

I have a couple of instances where I have a rehearsal mark, a tempo 
mark, and a tune name all wanting to be over the same barline (this is 
an arrangement, where there are several tunes and each is identified 
where it occurs).

So I have something along the lines of

<<
{ s1 | \mark \default \tempo "poco allegretto" s1^\markup "This is the 
army mr jones" s1*7 }
{ c1 | R1*2 }
>>

However, the two "s1"s are causing the R1*2 to print as two separate 
bars :-( I'm also getting

warning: MultiMeasureRestText has empty extent and non-empty stencil.

in the log, which I guess is related. Any ideas how to get the rest to 
print as a multi-measure rest? The problem, from my pov, is that the 
first, markup, line is meant to be shared across multiple parts, so if I 
do s1*8^\markup, the text is centred over the 8-bar phrase or some other 
wrongness, although that fixes the multi-measure-rest problem.

The other problem I have, is is there any way I can shunt markup left or 
right (both tempo and text)? I've been using extra-spacing-width, which 
works a treat sometimes, and is dreadful elsewhere. It's been fine for 
rehearsal marks, but when I use it on tempo and text, it's been shoving 
the music out of the way, which then looks awful. I just want to push 
the text slightly to the right to avoid colliding with the rehearsal 
mark (and I have tried extra-spacing-width leaving one or other argument 
at its default +-infinity, and again it seems to work sometimes and be a 
nightmare elsewhere ...) All the horizontal adjustment stuff I've seen 
seems to be for in-staff objects like lines, noteheads, accidentals ... 
will they work on markups?

Pointers greatly appreciated ...

Cheers,
Wol