Night Works for mixed quintet

Audio / score: 

This is great! I'm definitely adding it to my yt music library.

Just curious:  when you write a treble clef for contrabass, is that a treble 8vb?  There are some cool passages in this.  I'm not sure if your use of grace notes in measure 80 is standard practice for today - I mean doesn't that kind of notation belong in the classical era?  Also something that is unclear is whether you are using a score in concert pitch.  And usually bass clarinet is written in treble clef just like a regular sopranino clarinet.  So maybe you are using a concert pitch score.  Thanks for the strange moods in this!