I have had two walking feet for my Brother SQ9000. After about a month, it started making a slapping sound. I was always having trouble with some puckers with mine too. After the second one started making the slapping sound right in the middle of quilting a quilt, I took it off, put my 1/4 inch foot on, and it sews so much better......no more puckers, so I gave up on a walking foot.