I have to put in my two bits here. I have a 6600 too which I love. Most of your comments are what has worked for me, but when I was having big eyelash problems, what I found was that I was inadvertently using my pressure foot knee lift when I went around corners, which lifted the pressure foot, and goofed up the tension. Now I FMQ without the knee lift, so that this mistake doesn't happen. (I have one quilt on my couch that I love, but was too lazy to take out when this happened
