Hello Brian
Just letting you know, that I used bed sheet material for my sails
Take a look at the sheets on your own bed and feel the texture and the weave etc
We got our material off a market stall and they were just right
Luckily, my wife was a sewing machinist and did a fine job
Rope edging is a nice touch, but be aware that the rope is not edge on the the cloth, but on the side of the material
This helps the mariner to know which way round the sails are…….In the dark!
All the best
Bob