Yea.. I wasent realy expecting replys from the thread starter or anything. More asking the whole freshwater DIY comunity. (as long as the thread is at the top of the page people will see it right).
Anyways, I would design it exactly like they have here, just under the substrate. Probably just barely poke the tops of the hops above the sand (if I go with sand) so it dosent throw sand up into the tank. I could see that being bad.