On 8/16/22 10:32, Jonathan Chapman via cctalk wrote: >> I think it was Dysan that first showed up with reinforcing ring kits > > Probably, "Grabettes." > >> Then why was is it that DD media bought well after HD media was available, >> in use, and the norm still had the reinforced ring? Tradition? > > You might be putting it in an old drive. It was also available without, I had > several thousand without reinforcements from Verbatim, bought in bulk bags. My recollection is that media tagged for RX50 use (the stuff with the arrow stickers) never had the reinforcing rings, as they were probably not needed.
--Chuck