You might think about this option for those pointy ends.
Layer the quilt and quilt as desired. Cut a piece of fabric across the width maybe 6- 8 inches. I can't tell how deep those points are on the end. I would cut this fabric one inch wider and trim down after stitching
Hem the cross width at 1/2 inch with a double fold. Hem one edge only.
Lay it on top of completed and trimmed quilt. Fabric will be right side together. The hem edge lays towards the center of the runner.
Stitch along the points and down the sides. Then trim the fabric points.
You then turn right sides out. Hand stitch down the hemmed edge on the back.