I have kept my puzzles private since I have used photographs from flickr and paintings off the web. Even though I have annotated them with their source I have kept them private to preserve the copyright requirements of the owners. In particular I have used photographs of The Lofotens by Stein Lilland and paintings of vintage cars by Alan Fearnley. I have also used the I Love Britain and The British Army sites.I prefer to use the quadrilateral shapes since they make it difficult to identify the edge pieces.