Comment/advisory:
Re "stopping point" - If my first stitching has a 3/8 inch seam allowance - my stopping point should be at 3/8 inch.
If my first stitching has a 1/8 inch seam allowance - my stopping point should be 1/8 inch.
That "stop at 1/4 inch from the edge" only applies when one is sewing/using a 1/4 inch seam allowance.