SMALL ROLLING PIN - It's easier to roll out the paste very thin with a small rolling pin. So if you have a large one only, consider getting a small one as well. You can also use it to thin out and to frill the edges (f.ex. leaves).
SPACERS - They help to roll out the paste to the thickness you need. You can buy spacers which you put on the rolling pin or you can use wooden lollipop sticks. You'll find more information about spacers
here.