So, I really thought this was gonna be a great idea and really easy to do, but after spending a LONG time working on it, seems that zipper towers don't work on a server?
I didn't find a good tutorial for the build till I was already halfway through with the process, even though I was doing it all wrong.
Eventually I found the right tutorial and figured out I had to start over. Even in the end I'm not sure I did it right. It looks like it should work, so either I did it right and it just won't work on SMP or I did it wrong and I have no idea where I messed up.
If you want to see the tutorial, you can find it here.