Multiple pitched trills, trillspan length

[Stefan Kägi]

Hi

I have a little issue with pitched trills:
http://lilypond.org/doc/v2.10/Documentation/user/lilypond/Trills#Trills

I'm trying to do this but with multiple trills. So the code looks kind
of like the following:


RH = \relative c'' {

\clef treble
\time 4/4
\key d \minor

<a d>16
\pitchedTrill d8.\startTrillSpan f \pitchedTrill cis4\stopTrillSpan
\startTrillSpan e d2\stopTrillSpan 

}

\score {
the known things...

}


So now the first TrillSpan collides with the second. Is there a
possibility to decimate the length of the trill span somehow?

Thx for your hints