I find it harder to keep a 1/4" seam with my Bernina 180 which has the 9mm stitch width even with a single hole throat plate. All those feed dogs keep moving the fabric around. While I love the 37 foot that I use with my older Bernina 1090, it does not give me a scant 1/4" seam. With practice, I found just the right place to put the fabric which, on my machine, is just under the foot so that the fabric barely disappears.