Thanks to all of you for the input. I have made over 200 quilts with this walking foot. The piecing is just fine. It is the sandwich that is having trouble being digested! I do have a new walking foot. test would be to use the new one and see if there is a difference. The pressure knob is on 3 - which is the most pressure I can use - the little dial on top of the Janome Memory Craft 4900