>>> I tried that, but as soon as a group of grace notes has some
>>> accidentals it produces bad output.
>>
>> Doesn't that sound more like the issue should be
>> "strict-grace-spacing produces bad output if grace note has
>> accidental" rather than "strict-grace-spacing should be the
>> default"?
>
> The issue I filed is not related to `strict-grace-spacing` at all.
Would it be possible to provide a `\Grace` function (and siblings for
that) that walks over all notes and rests in its argument to change
`{NoteHead,Rest}.space-alist.next-note` (or rather a equivalent to
this since `space-alist` doesn't exist for these grobs) to
`fixed-space`?
Werner