Thanks for the reply guys. And thats a good idea using one 3gal and perhaps one 5gal. I was hesitant to use the latter because I don't know how the plant will respond to going from a 4x4 RW cube directly into a 5gal bucket.

And I agree not to let the screen fill entirely before the 12/12 switch. I guess I'll have to just play that one day by day.