A few different methods used so far. I think I prefer binding the hem. Much cleaner and easier as rolling is a pain. My thread injector does not have a rolled hem attachment which would have made life a lot easier.
do you mean binding the hem by using the 16mm grosgrain?
I'm thinking of making something quite big and using that on the edging as you have and the loops and using the 40mm to create a diagonal and a cross on the top side for strength when I'm pitching it.