Yes, works like a charm. I did set DF0 to use real floppies and Greaseweazle ticked.
Think, you missunderstood. As well what you just said, you also need to set if drive is 0, 1, 2. Or for PC drives A, B.
I think it defaults to Amiga Floppy 0. So if it were a PC drive you have to set it to A.