Hey JB were your ears burning yesterday? I was thinking the same thing. I have been using 3 gallon with coco. My choice was 3 or 5. I chose 3 due to, that is what I have been doing anyway, Someone here (can't remember who) posted that they did a 3 vs 5 comparison and found no difference in growth, but increased high humidity problems. Humidity is an issue to cope with here. Also there would be an increased use of nutrients. Then there is always the voice that says what if... I pondered the question what happened to bigger pots, bigger roots, bigger plants theory? Did I really know? So in the second half when the clones get going I may do an appropriate experiment to see if there really is a difference. Right now I need to get things going and do not have time for pondering what could be.