I've got a link to a couple of video's of the system running.
We added 250lb of rock wednesday, some nice large pieces. Its already at the nitrite phase of the cycle!
Got the UV running and the skimmer modded and running pulling a lot of crap out of the water already. We also added 2 Koralia Magnum 8 powerheads to the display tank and WOW do these puppies put out a lot of flow, maybe even too much :O
http://www.youtube.com/watch?v=yCVyZ0XWk0c This is the water movement in the sump, quite a torrent
http://www.youtube.com/watch?v=1--RJM2pSV4 This is the whole room and system.
Oh, PS. Tried the kitty litter for a fuge substrate, BAD IDEA! I ended up scooping out 32kg of litter and cleaning out that 70g. It made the water really gross, and acidic. (I checked, it was clay, unsented cat litter... its just clay...) So i'm opting for a standard sandbed 5" which i'm waiting for from the supplier.