I'm using my machine to make a puff quilt. I came across the petal set. What's the difference between the large vs small set?I've made seven (cute) little puffs so far measuring 5'', and the base is 3.5''. I don't know if this kit would help/change the size or something, but I'd love to give it a try if it's practical. Anyone have any experiences or wisdom they'd like to share. Thanks!