As a project for a friend, I agreed to LAQ a quilt she'd made for a grandson. She brought a sheet for the back. Well, live and learn. The tight weave played havoc with the action of the machine. No needles broken, although I did change needles several times. The top thread would go down and be caught just fine, but the weave put so much pressure on the thread, it didn't always come back up. Big loops all over the back side. Of course it didn't act up when I was testing it. It took me days to get it all ripped out. More practicing and many calls to the manufacturer, I finally called the friend and explained the situation. She said she wasn't concerned, her grandson wouldn't even notice. I didn't charge her, but I'll never do it again.