Plants have 40" centers. The room is 11'x22'. Looks cramped and my other rooms are cramped as well. The strains I run tend to go taller, not bushy.
The plastic on the 27 gallon tubs are thicker, which makes the uniseals harder to use. I think this is the only time I wished I had more of the Home Depot tubs instead of the Lowes tubs.
HD Tubs and uni-seals aren't any easier than the Lowe's tubs. Cutting the PVC interconnects at a diagonal helped a lot.