On the 6500, release the presser foot pressure -- it helps. I have done several fleece backed quilts (mainly in the ditch with a walking foot). I did spray the top and bottom together when I had the 6500. The one I put batting in, I made sure the lengthwise grain of the batting ran in the opposite direction of the stretchy direction of the fleece -- this seemed to stabilize things. I have used a lot of Minkee, too and I spray baste that as well -- talk about wiggly!!!