Thanks for the \grace {skip} suggestion. I haven't tried it yet.
Somewhat related to this thread:
I want to use the "slash" style grace without a slur. I discovered in
the acciaccatura definition that this is done with some bit of scheme
which I don't remember at the moment but could find again. What I would
like to be able to do, and have not figured out yet, is to use that
"slashed" style with beams. I have some things in a score I'm working
on which are written like that. Two, and even three notes beamed
together with a slash through the beam/stem. No slur is involved. How
to do this?