I know one person that use to enter all the major shows and she won several ribbons. She always backed her quilt top with featherweight fusible. She said to keep the fabric from moving when quilting. The back is stretched tight so it didn't move. She said there are lot of tricks used to make the quilt look as perfect as they could get them. The big winning show quilts are never used like a quilt are they? More like a piece of art.
I stick to local shows and fairs. LOL