I was once asked to re catalogue and/ or re-number a filing cabinet of paper references of which there was around 1000, but there were errors, some duplicate numbers, mis filing. I tried to do this in endnote. It is time consuming. I don't mind the paper reference system and manual coding/ manual numbering as what frightens me is the electronic way of extracting, copying and saving copious references, that is very unsettling in fact.