Maybe you were looking for one of these abbreviations: RCMX-RCN-RCNC-RCNN-RCNO-RCO-AK-RCO-NE-RCoA-RCOCI-RCOE.
Measure the width of your quilt and add 4-6 (or chosen excess). Design a backing to equal that width, adding 1/2 to each panel for each seam you'll use to sew it to a neighboring panel. Cut panels to the length of your quilt plus 4-6 (or chosen excess). Sew panels together with a 1/2 seam allowance. Press seams open to reduce bulk. Press backing before use.
When sandwiching a small quilt simply tape the backing fabric wrong side up to the table using masking tape. Don't stretch the backing as you are taping, it needs to be firm and smooth as when it is ironed but not stretched. Then lay the batting on the backing and sort of pat the batting in place. You don't want to stretch the batting. If you need move the batting lift and replace. If the batting is stretched when it is laid on the quilt it will spring back when the backing tape is released causing the quilt to pucker.