Hi Charles, I do not have problem with DX codes but I wondering about supply of good quality cassettes in future? My experience with AP metal cassettes is very bad, it's basically junk. I had some luck a few years ago when in Japan I bought Fuji brand re-loadable, unfortunately they are not longer available. Week or so ago in Columbus, Ohio, I found bunch or metal cassettes with some barely visible lettering from Seattle film works, but they look like unused. Years ago Freestyle had very good ones with "bras colour" lids, very similar to Ilford from that time. Maybe it's the last moment to start hoarding all of them???