I try to NOT listen to our very annoying piano music - its music for people to use for very high level music exams, and was written by composers you've never heard of, who wrote it when in a VERY bad angry mood. Every time you think you have it perfect, you hear a mistake - every single time. We now do a separate joint final review. If we both press play and stare at the music, and do not hear a mistake. That is it. We publish it and don't listen again, because if we do, we might spot the Ab hemi-demi-semi quaver in bar 324 that should be an A.