If you are quilting on a DSM--try this. When you come to the places where stitching is going to intersect, drop the needle into your work about 1/2" before that stitching and give a little tug on the other side of that stitching that's already in place. You are pulling on the bias and that may be enough that puckers don't happen. It works for me anyhow. I assume, too, that you are using a walking foot in this quilting.