extra staves - help required

[Bill Mooney]

Greetings,

The accompanying .ly file produces the result in image 'extra-staves-1.png'.
Can someone explain how I can modify the .ly file to obtain the result 
in image 'extra-staves-2.png', please?

The .ly file was made using aspects of the 'Adding an extra staff (2)' 
snippet in the Snippet Repository, as well as other bits from the 
learning and notation manuals.

My 'client' asked for the reduced size bracket at the beginning of the 
single staff. (The client is always right) but wants the curly braces at 
the beginning of the 'choir' part.

Many thanks

Bill

extra-staves-1.png
Description: PNG image

extra-staves-2.png
Description: PNG image

extra-staves.ly
Description: Text Data