ontheriver, the method you have discribed would then give you HTSs with the edges on the cross of the fabric, which will have the tendancy to stretch when sewing unless of course you are prepared to starch the diggens out of it before you start. I usually use a square about 3/4" more than the size I want, put two pieces rsf and stitch 1/4" either side of a marked diagonal, then cut on the marked diagonal and trim to size, this method only gives you two hts but it puts your outer edge on the straight grain.