For my sins I am our band librarian and would like to know what other band libarians experiences are regarding amount of music in folders. From my own experience it seems that the human brain can handle up to about 30 pieces out at any one time. After that stuff starts to get lost or torn or fed to the dog or whatever else players get up to with it. I've just spent the best part of a week sorting out our folders in which I counted 67 individual sets of music and a collection about 20 'odds and sods', most of that being stuff that should have been handed in months ago. Percussion and front row cornets are also the worst offenders in respect of multiple parts in one folder which sometimes results in there being no part at a rehearsal if the owner of such a folder isn't there.