Ambitus after incipit

[Bockett Hunter]

I am doing an edition of some early music, so each voice

has an "incipit", which is the start of the music in the old clef.

(There is an example in A.5 Ancient Notation Templates.)

I also wish to show the range of each voice.  When I add

    \context {

      \Voice

      \consists "Ambitus_engraver"

    }

to the \layout, I get a range at the very beginning of each voice,

and it is in the old clef.  That makes it hard for someone to

glance at the score and see what various voice ranges are.

What I would like is to have the voice range displayed 

after the incipit and before the modern clef, in the modern clef,

Nothing I've tried works; I would appreciate help.