When I was teaching myself to applique while working my Dear Jane blocks, I was having lots of trouble with the small seed shapes. I bought the Appliquik tools and it is slick. There is a very thin fusible interfacing that you trace the design on and cut along the tracing line. Press the fusible side to the back of your fabric and trim leaving a narrow allowance. Use the glue stick pen on the raw edges and the metal tools to fold the raw edge over the back side. Then hand sew to your block. I use 100 wt poly thread, Invisfil. If you can cut a smooth edge on the interfacing, you can get a smooth edge on your applique.