I want to make pillows out of plush fleece (an older blanket I have) for the local animal shelter. My Janome machine is having a very hard time, in fact, it would not go through the three/four layers I was trying to sew (wanted to do an envelope style pillow). Any tips from those of you experienced with sewing with such thick layers would be wonderful. And I could ask, what kind of machines are you using to do this? Thanks in advance for any help. (I was able to make a small one for my cat, and she absolutely loved it. She sank right down into it.