Yeah, I'm thinking of the 68 CFMer now.
The water falls about a foot before hitting the sides of the bong. It then rides the sides down another three feet. Some of the water is in freefall the whole way, but not all. This lends the setup a nice trinkling rain-on-the-windowsill sound. it's a four foot setup.
My AS3 hasn't fully settled either. Should lose a degree or so there in the next day or two.
If anything is a problem with it I think it might be flow. I'm not sure what I'm getting but it's not all that high, hence this post.
These temps do seem high for a bong though, but I just built the thing. Given time to tweak it I'm sure I can trick a few more degrees out of it. I don't wanna drastically change anything right now. It's quiet, good looking (wait till I get around to pics

), and it flows in my room.
--Illah