thanks for your thoughts... this satin I am using today is not very think. Its pretty but not very thick. The slipper satin was thicker.
I put the fray block all along both sides that were cut. It was quite a job. 550" x 4.5" strip spread from my living room to the dining room and back.
I use the June Tailor and it dries very soft.
I think next time I might try the wider seam and try the extra sewing line. I will pile on some starch too.
I just want to try this a different way so maybe it will be easier