When using a felling foot, how can you sew the fell side of the seams to face each other (i.e. both facing front/front or back/back) while still sewing from hem to cuff? Is it possible to use the felling foot without going from cuff to hem on one of the seams? Going hem to cuff means one seam faces the front and the other faces the back which isn't the way it looks on my store bought shirts. Am I missing something really basic? I'm new to this.