Hold on a sec ... this uses the same GCR method employed for the Macintosh. Why couldn't this be adapted to read Macintosh MFS & HFS 400K & 800K disks.
And let me get this straight ... in the future one could pop an 800K disk into a 1.44 MB 3.5" drive and write a 400K Macintosh disk image to it, so that it would work in the original drive? Wow!