Yo, honestly sounds like you're right on track with that AK47. If you're still sitting at 900 PPM, she’s definitely still got some "fuel" left in the tank, so getting that down to 200 is a solid move for a cleaner burn and better flavor.
Just make sure you're using pH-balanced water for that last flush so you don't lock anything up weirdly at the very end. Also, keep a super close eye on your humidity right now—those AK buds get pretty dense and you don't want any mold issues popping up when you're this close to the finish line. If the leaves are starting to yellow and fade (that nice "autumn" look), you're doing it right!
Enjoy the harvest, man. It's looking like it's gonna be a fire smoke.
Happy Growing Growmie🌱?💚