Great grow man, I had 3 plants under a 400W HPS in 4th week of flower. Spent a weekend away and it was a scorcher came back to them in a little worse state than yours and unfortunately it was still hot and under the HPS I couldn't get the tems down and the things died on me. Mind you I crushed the lot n made oil out of it. Made a good 20ml of some insane oil. Put it on all my sore they were all 100% gone with no scarring and dad used it on his sores and they all are almost gone, it's ust the best stuff. Too bad I didn't get them the whole way, I would have had some good smoke to have and much more oil!
You're grow looks good, you could possibly look at getting an automated watering system, you have plnty of room under the plant, use a small res and PH, and TDS test the water, keep the nutes low coz it's soil or don't even put any in at all. Have a small pump run like twice a day for a couple of minutes or something. I noticed early on the plants seemed to be geting too much water, let them drink all the water near them in the soil before watering again, at first it will help them a fair bit, on my first indoor grows I overwatered and the plants in rockwool and soil setups and the plants seemed to grow slower and a bit different to normal. Something to think about I suppose.
All in all mate this looks like a solid setup you've got most of it figured out
I had a lot of fun scrolling through all your pics, bit sad when they go down hill though