I love my 15-91's and Necchi BU Supernova for FMQ. I also use my 301's, 500's, 66, 201-2's. These machines do a wonderful job. I've never used my 221's for FMQ. I don't remember if I've tried my 401 or 404. I have a new Brother that doesn't do a good job with FMQ. The bobbins on the Necchi and 15-91's hold the most thread and this is a plus.