@haze - sorry, didn't intend to dodge! I'm getting my supercard pro and TEAC FD55GFR drive setup tomorrow, so I can write disks. am waiting for it to arrive, so I can test against it.
You need a 40 track drive for Mindset floppies (FD55B).
You can't reliably write 40 trk disks on an 80 trk drive.
You also need 40 trk media (not 80 trk HD media)