Hey Scott-
Man you're crazy!!! I just had a hell of a time with my set up and it's only a 220! And everything is inside my house!!!! Looks like it's going to be an awesome set-up though. Can't wait to stop by to check it out. I finally moved all my livestock over. You and Erin need to stop by and pick out some frags. Judging by the sump you guys made me, I think everything will turn out beautifully. I have a suggestion on your frag tank though, I've got a similar one, 36x16x8, and really wished that it was taller. If you plan on putting any kind of eggcrate rack in there, that will take 1-2" plus you won't run the water to the very top so that takes out much of the height. Mine is glass so it's measured from the plastic frame so the actual height is really only 7". So I'm just going to set the frags on the glass without eggcrate.
I'm still shaking my head thinking about the sale of your 748. I sold my R6 two years ago and am still kicking myself!!
buggle