Oh wait until you see this thing. It is a little palstic foot that will fit onto any machine. You have a concave and convex curve cut (like drunkards path) instead of fighting the outter curve (convex) peice into the inner curve (concave) you simply match the two ends together and lay them into the foot. Start to stitch then hold the outter curve peice up a bit and the foot will work them into perfect position while you sew the curve. No easing or cussing. and it is a perfect 1/4 inch.