Grow #1 - 75watt LED CMOG bagseed

Yellowing leaves started appearing, you can see what fell/was plucked. From the trichs on the cutting I think I still have a ways to go, very few amber heads, and still tons of white pistils everywhere too. So I did what people don't generally recommend during flower, I fed it more nitrogen. I thought the leaf yellowing was too rapid and I think I still have 1-2 weeks to go. The main plant has always had fairly pale leaves throughout and it got worse this week, along with some continued burn?/K def? I'm not doing a 2 week flush either, maybe just a few days of water only in the last week. The cutting has no yellow leaves and has been filling out nicely, super proud of it. You can see the blumat inserts in place, I tested it for a few days, water only and it worked fine. I actually think that run of "flushing" led to the leaf yellowing. I have small pots for how big the plants have gotten which I'm thinking might be contributing to this sensitivity in terms of nutes. flowers on the main are getting heavy, the weaker branches are kind of leaning against the bigger ones. I'm considering putting some stakes in place just to prop them up and ease the mechanical stress.