The pagebreak/linebreak/stretching is put into an alist, and stored
with the system in a table
... will it also be possible to set the *absolute* page position of
each staff (and therefore each system) on a page-by-page basis (by
means of some reference point, possibly the bottom staffline of each
staff)? Something like:
page 1:
system 3:
staff 2, bottom staffline: 29.92 cm from page-bottom
staff 1, bottom staffline: 26.24 cm from page-bottom
Perhaps absolute positioning might not be the right way to go, but it
would certainly help me vertically fix staves exactly where I want
them on the page. If absolute positioning doesn't fit with the model,
then that's certainly ok; but if we can think of a good, lily-esque
way of adding absolute positioning during the proposed refactoring,
then I'd certainly be interested in helping fund the work.