No one has mentioned this: I am making a selvedge quilt, and as I get selvedges, I sew them to a foundation square made of "Sediment Shield", which weighs next to nothing and won't have to be removed. It comes in different widths on a roll, and is used to line underground drainage pipes to keep dirt out of them. I bought it at Lowe's. A quilter friend who made a selvedge quilt, which was very heavy, told our guild about it, and planned to use it for her next selvedge quilt. So far I've only made squares, but I like it. Just don't hit it with an iron.