So these are moving along but do seem to want more feeding. Though a week or two one (the whorled plant) got some tip-burn at lower levels, they're both persisting on having a bit of yellowing so I bumped up my feed and leaned a little more heavily on the Nitrogen heavier Maxigro. I ended up with a 50/50 mix of Gro/Bloom with 2.5mg of each, then 1ml of Ca/Mg as well. While at it, I did top the plants somewhere around node 6, and they're starting to branch a bit. Once the feed thing is more under control all will be good. Last run with Durban Poison the plants were more prone to over-feeding with less than I'm feeding now, so its been a bit of re-learning. By next week I'll start some LST to get everything spread; They're pretty dense in terms of growth.
10/5/2022: So after hitting them with a full 5mg of Maxi 4 days ago, these plants are pretty full-happy right now. Maybe a bit too much nitrogen (I'll pull back on the Gro and lean a bit more into the Bloom, and yes, I know I can just use Bloom. They've greened up and really appear to be excellent. I was worried that the 5g amount would be too much, but even though one of them got some burn at 3g, now they're both great with it. they also grew quite a bit and I re-topped them down a little further. Now I have about 3 or 4 nodes to work with in terms of getting them widely and evenly spread. I also removed any/all leaves that had been previously damaged. I watered them at about 2 gallons per pot with my filtered water + 1ml Ca/Mg and recharge. Ended up with about 1.5l of run-off each.