I cannot move my sandwich the way I want without my Machingers gloves on. Curves are one of the hardest to start with to keep them smooth. I started with designs that had spots where I could rest, with my needle in the down position, reposition my hands and sandwich and then move on. I then moved onto designs like tear drops that came to a point to rest before moving again. Try doing a daisy where you can rest when the petal loop comes back to the point you started. After doing 5 loops(teardrops) do a line over a bit and do another daisy.