I have a Q-snap floor frame and I start in the middle and work to the sides. You quilt in a hoop so I would thread bast the sandwich and then position the hoop middleish and work out in overlapping lines across/down the quilt. The reason you advance in a march to the edge is so that if there are any wrinkles, you can get them to the edge of the quilt without a pucker. This is my understanding, someone correct me if I am in error.