I also use Sharon Schamber's method, but modified. I don't use boards...I use our dining table and if the quilt is too big I just let it hang over the edges and the weight keeps the part on the table tight enough while I thread baste. I usually start laying the layers together at a corner and slide it around my table to make sure all the layers fit together before I start basting. I couldn't do floors any more and don't have the space anyway.