Move your needle a little to the right to make scant 1/4" seam. As long as you keep checking needle position this should work. This is what I do on my Singer when I use the regular sewing foot. Most pattern call for 1/4" seam but if you are consistant with your seam allowance then you should be alright. Size of quilt may vary due to larger/ small seam allowance. Also what is "scant" anyway? My definition of scant may be several threads smaller/larger than yours.