When I do QAYG in columns I use fusible batting & sew the batting in at the same time as I sew the top & back. I did a couple of small quilts that way & am getting ready to do my king size scrappy quilt. I am in the process of sewing the columns. I only have 2.5 columns to do then I will start the sandwiching & quilting of the columns. My goal right now is to get the columns done before we close on the Midland house next Tues. I will quilt it in Brady.