the quilt tops i receive in the mail are simply folded to fit in the box being used to ship them=the backing is also folded neatly- don't over complicate things.
hopefully you didn't go overboard on the starch- i've had a hundred or more quilts come to me through the mail- never had one starched first- simply pressed neatly, threads clipped and folded- placed in a plastic bag to protect it from possible (mail mishandling-or inclimate weather)