There are four fans within the room for air movement. The co2 runs the entire time my lights are so i really do not worry about any escaping.
The canopy is even, all plants are within 4 inches of each other throughout the grow cycles. In other words they stay level at the canopy. While the russain isnt known for yeild the chronic is. Both come from selected pheno's within the strain that I liked the most. the russain pheno is big bulging buds, very little leaf, and frosted. The chronic has a touch more leaf but the cola's swell up big time adding extra weight. As I said I'm happy with the final product, but the buds could be denser and again, there just doesnt seem like im getting what the room is capable of putting out.
Last cycle got me just over a half gram per watt.
Roots look great the entire time, but by the very end they can get a touch rootbound, but not bad, and i have grow plants that were much more bound in the end.