chordnames, fontsize and raise

[Toine Schreurs]

The size of ChordNames can be changed with
\override ChordName #'font-size = #1.5

In the resulting score, the chordmodifier is raised with respect to
the root. The amount of raising is apparantly independent of the
font-size.

\version "2.14.2"
notes = \chordmode {
  \override ChordName #'font-size = #6
  c:7 
  \override ChordName #'font-size = #0
  c:7
  \override ChordName #'font-size = #-6
  c:7 
}
\score {
  \new ChordNames {
    \notes
  }
}

According to scm/chord-ignatzek-names.scm this raising is done via
make-super-markup. Is it possible to change the amount of raising or
at least make it dependent on the font-size?

Toine Schreurs