Dear Giles,
I link you a complete work written by my own using Sibelius.
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I usually make this kind of transcriptions, as I am part of a choir and I usually do the piano rehearsal, so I have a good eye to check all the voices and detect mistakes in the sheet music.
Also I have work deeply in Mozart's Requiem, so I know very well the different parts, voices and transcriptions for the orchestra to piano.
I hope this time we can work together for this project.
Best Regards
Ivan