First, you've done a lovely job at growing those out. Respect.
I do, however, have something a bit more to add than "good job."
I noticed the foxtailing structure of your upper buds. I saw something very similar in the Diablo OG Kush grow I finished recently. I have to say, although that foxtailing structure is visually interesting, I've come to realize that it's indicative of stressed growth and doesn't turn out to be the best bud. That look lacks jar appeal also and won't be welcomed by shops if you plan on trying to vend any.
That foxtailing structure is caused by heat plain and simple. I've been using an aggressive LST technique using string ties for my past several grows in an effort to keep my canopy low, and it worked pretty well, but my very top buds were still getting a bit more heat stress than I would like. So I finally built and installed my scrog screen to really lay those bitches down. It looks like you have a good handle on the basics of making ganja grow, so advanced training techniques should be your next chapter. The more space your canopy has from your hid's the better.
As for an active aeroponics system like yours, I don't think your level of growth and vigor are too different from my aero/dwc hybrid tub, so I though it appropriate to share this insight that dawned on me recently. Roots being fed by active sprayers, like in your system and mine, do better with lower ppms (say versus a straight DWC soak or flood/drain). The spray system of delivery is so energetic, that less nute is better. I say this because the best bud I've ever grown was run on lower ppms than my last two grows, which produced good weed, but not as good as my lower ppm grow. The plants were a bit smaller, but the nug quality was superior in every way to the larger plants I exploded by pumping with very high nute levels.
Something to chew on. For my next, I'll be scrogging with my screen and running a milder nute strength throughout. Less is more with aero sprayers. Less is more.