Here is a new thread that I started with a first generation tornado. As you can see, there are a lot of differences between first and second:
http://foosball.com/forum/index.php?topic=6036If the link doesn't work, you can search for "first generation tornado".
I am looking for other information on this table, but have not been able to find anything at all. Please reply to my thread if you have any additional information or pictures. Thanks!