@w8emv @thomasfuchs That document also mentions the Epson SD-525-001 is compatible, which might also help - Epson docs are easier to find, IME.
The Equity 1 manual is here: http://web.archive.org/web/20200120025311/http://files.support.epson.com/pdf/e1____/e1____u1.pdf But unfortunately it doesn't have much detail on the floppy drive.