About those Northstar disks .... I'd consider cutting open the jackets, removing the mylar, rinsing it in clean water, drying completely (be careful not to dent/crease the mylar) and put the mylar into a new, cut-open jacket Hard-sector disks (both 5" and 8" of any type at all) are VERY hard to find. They do show up on E-Bay occasionally, but not often. I think that Pat Swayne of SEBHC (society of eight-bit heath(kit) computers) had some NEW 10-sector disks newly made last year. They are, however, expensive (almost $2 per disk), and I'm not sure if he has any left.