The correction list to the Collectors Guide does not exist as far as I know except in John Chidester's notes. The guide was an excellent book put out by John and Paul Brady with input from several members of the Forums. It didn't sell well because of the decline in interest for lighthouses and Harbour Lights in general. An update with all the corrections will probably not happen. The only thing you can do is ask questions and when Tony at HLs put out his updated product list, keep it close by your Collectos Guide.