Oh, what a PITA!! I put mine on a styrofoam dummy, and skewer it into place, through the top, with two skewers. I pipe a soft icing on it with a flat "ribbon" or "basket weave" tip, then smooth it gently, scraping the excess off. Then go around the top and get the edges smooth, working around the skewers. Remove skewers and patch the center of the top.