I've quilted a couple of king-size quilts on my regular sewing machine; I have a Bernina 180. Do wish it had a bigger throat opening but it can be done. Just choose a small area to quilt, move your quilt and do the next area. Sometimes you have to "fluff and stuff". Also helps to have an area in the back and to the left side to hold the quilt up. But do start off small and work your way up to the larger sizes.