Today I decided to attempt to model an S&S Screamin Swing thrill ride in CATIA V5 R19. Here are two pictures and the 3D xml of what I made today. It's a little rough around the edges but you get the idea. I made up all of the dimensions since I have no idea what they actually are. I think the scale actually came out quite well. Not as exciting as a roller coaster but the file size is much smaller! You can see some of my other creations at Campus3ds website. Enjoy.