I think your friend got that setup from me then (the link is on my signature).
I'm the friend of dracultepes who built these towers. You're right, I saw that setup in the thread you linked and built it because you've done a good howto and explained how it works so precisely 
It was a good decision since our old tower-setup used much more space, so we weren't able to produce the amount of energy we needed 
Thanks for this great setup It worked like a charme until we updated to MC 1.5.2/IC 117.921...