Love your design! Your lap quilt will be beautiful! Sorry that you are having trouble with the pinked edge. Frankly, I prefer sewing fabrics with a pinked edge, especially Kona cotton. I hate having to cut off all those fraying threads before sending a top to the LAQ. (I just leave the threads if I quilt myself.) I use a 1/4" foot with a blade on my Featherweight, have the top of the pinked edge next to the blade, and end up with perfect seams. I don't sew as fast on my Featherweight as I do on my Bernina. Maybe the slower speed helps me. Best wishes with your seams.