Dear All,,

this is my first time posting here, the community is wonderful and LilyPond
serves me well.

Recently I have made a lot of work with reworking Lukas Pietsch's
Blackmensural in order to produce the whole scores in blackmensural
noration. I need your very appreciated help with the custodes.

I rewrote how mensural ligatura works – under the hood, it now makes for me
one EvenChord instead of SequentialMusic with hidden noteheads. This made
possible horizontal adjustments to be finally done in a better way.

However, this broke the custodes, which now think that if a system starts
with ligature, it hints all its notes instead of the first one.

Do you know how to trick the custodis stencil calculation to be set a given
pitch? I will extract the first NoteEvent from the ligature – that's not a
problem. I don't know how to make this custos appear at the desired
position.

I attach a snippet with standard notation.

\layout {
  indent = 0
  \context {\Staff \consists "Custos_engraver"}
 %\mensuralTightSetting if blackmensural.ly is included.
}
\paper { ragged-last = ##f }
\relative {
 c'1 e \tweak extra-spacing-width #'(0 . 1) g \break
 <d f a>^"Let it's custos hint only to note d..."
}

Thank you in advance for your help!

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