Borders and I do not get along. I usually glue baste them on first starting from each end going to the middle, easing as I go. There is a neat trick I saw on QnnTV about overlapping the wave at the seam line and it can't be seen. I've used that method for big quilt borders. Also I learned to sew all the borders together and then having only one big border to sew around the quilt instead sewing them separately on the quilt.