I think I made my final adjustment to the setup of the grow tent. I re-did the plumbing to allow them to be more centered in the tent instead of pushed toward the back like before.
Left plant continues to just explode in growth. Still using the trellis net to spread it out and it seems to be helping the growth sites.
I also picked up that UNI-T Lux meter for a cheap-o PPFD meter and adjusted my height/power to match my plants' DLI needs.