I finished and handed over a calendar project last week which my client approved. I contacted their printer of choice who told me they needed the pages sending across as individuals, despite the fact that it was to be printed as a book style calendar. My client has since decided that this printer is too expensive after their quote changed, and have opted for another one. This printer has contacted me today to ask if I can send the pages across as pairs. Am I obliged to make these changes? The project is pro bono for a local charity and the printing cost is being footed by a corporate partner or theirs. Thoughts?