Hey, good luck with your new tank!
I just broke down my same exact tank a few days ago, doing a 3 gal iwagumi of HC isn't easy. At least it required more attention than I was willing to give. Keep us posted, and here is my journal on it: bitFUUL's 3g High Tech Toilet Tank - (UPDATE - Iwagumi HC with PICS!)
Also, got more info on how you automated the webcam/shots?