It should be mentioned that a similar folding method for the regular heptagon is described in the article Draw of a Regular Heptagon by the Folding"by Benedetto Scimemi ([4]) in the relatively hard to find Proceedings of the First International Meeting of Origami Science and Technology. (I have only recently gained access to a copy myself.) This volume offers a great many ideas for further research for anyone interested in the geometry of origami, and is certainly worth searching for.