Wow, I haven't been to this site in awhile! I'm working on a little Schwarzkopf portable coaster with 3 loops. It looks like the Dreier Looping but it has a different layout.
http://community.webshots.com/photo/552717380/2774848750094517463vBNyDA#
http://community.webshots.com/photo/552717380/2988787990094517463xZhWZY