I have a Janome Horizon and purchased the 1/4" quilting foot with the metal flange. I can make consistent 1/4" seams, but I measure before starting a new project. I have a little plastic guage with a hole in it. I put the needle through the hole and check it for accuracy. Better safe than sorry. Once you get it adjusted, you can't hardly drag it out of alignment. I had to get one to keep me accurate. $23.95 at Janeome, locally.