I have taken the quilt completely apart and carefully re-pinned. It is still puckering on the bottom (not as bad). I
have lowered the pressure and increased the stitch length. My feed dogs are pulling the fabric through a lot more
than the top. I wonder if I should have put more starch into the backing. I am just brainstorming now because this quilt is kicking my butt. I put pins in about 4 inches apart, and I have done the whole process of quilting many times before and never this
problem. Thanks for your input