I used my pasta machine and went to 4 on it for thickness. This is about the middle. You have to use the deep blade, won't work without it. I placed my gumpaste out on the mat and let it set about 15 min, minimum. Actually some of them were left longer. (i got side tract) My blade was set on 4. Pressure min (2nd bar I think) speed on 3rd bar.
I did find doing letters below 2 inches was hard. Also after you cleanned the sticky off your mat. You want to place shortening on the mat for your gumpast to stick. I had to reapply after a couple times.
Have fun and just play with it.
PS if you are using markers, make sure you have on the lowest pressure, otherwise it digs in and doesn't write.