key signatures in ossias

[address@hidden]

Hey all,

I'm currently working on a bit of music with a key signature in the ossia that 
is not in the main voice.  The typesetting is meh due to the large gap to 
accommodate the key signature.  Is there any way to make it such that:

a) the key signature is typeset before the arrival of the notes in the ossia?
b) there is no gap to accommodate said key signature?

\version "2.14.0"

{ \repeat unfold 24 d'32
  <<
    { \repeat unfold 40 d'32 }

    \new Staff \with {
      \remove "Time_signature_engraver"
      alignAboveContext = #"main"
      fontSize = #-3
      \override StaffSymbol #'staff-space = #(magstep -3)
      \override StaffSymbol #'thickness = #(magstep -3)
      firstClef = ##f
    }
    { \key cis \major ais4 ais ais ais ais }
  >>
}


Cheers,
MS