You can actually do the same thing with a thumbtack & a piece of tape. Stick the point of the tack into the tape with the sticky side facing the head of the tack. Stick it to the bed of the machine (pointy side up) however far from the needle that you want the center of your circle to be (5" circle= 2.5" from needle). Stick fabric on thumbtack (right side up)...& sew! The fabric pivots on the tack & will feed thru the machine in a circle.