Seamstome- Your description is right on. If I'm doing a block that has lots of points (triangles in it), I'll cut strips that are the width of the triangle plus 5/8" for the total seam allowances on both sides and a bit extra for fabric to be lost in the fold over area leaving enough for a 1/4" seam allowance. After each section is sewn on, I'd press the seam, then open it out and press again with a dry iron. Then trim off the edge so I'm leaving a 1/4" seam allowance and cut from the strip. Now it's ready to add the next section with my strip -right sides together, line up the edges, put in a pin or two thru the paper and fabric, stitch on the line and con't. I learned p.p. from a book by Valorie Wells, "Radiant New York Beauties".