Buds are continuing to fatten up, and starting to get nicely frosty. It's hard to appreciate from the photos, but some of the fan leaves are starting to yellow noticeably. Looking from this main angle, itt's not entirely obvious... but if you look at the plant from the other side it is clear that the entire plant has begun to yellow, not just the fan leaves. Some leaves still have a nice green color, but the overall hue has shifted towards lime green.
I feel like it is too systemic to just be the plant cannibalizing nutrients for the flowers, and too early. I'm going to check pH (which I haven't been doing so far), give the plant a good flush and up the nitrogen dose a little bit. I may just be under-feeding the plant across the board, since it's heavily in flower now. I'll get some close-up shots of the yellowing next week.
Otherwise, I think the plant is doing pretty well. Just need to nip this deficiency (whatever it is) early so that it doesn't continue to cause problems.