self-alignment-X for trills?

[Trevor Bača]

Hi,

Is there any way to get the "tr" trill glyph in a trill spanner to
left-align to the parent notehead? I would think

 \override TrillSpanner #'self-alignment-X = #left
 c'4 \startTrillSpan
 c'4 \stopTrillSpan

would do it, but the TrillSpanner seems, er, highly resistent to most
of its interfaces.

Am I missing something?


--
Trevor Bača
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