About the harvest time and will the fatten up a bit more?

Ingen grund til bekymring de kommer men er nok ikke så store pt da som du selv siger det er mest Sativa. Held og lykke med grow til dig growmie 😉 looking good real good have a good big Smoke 👌✌️💚💚💚👌💪🎃🎃✌️💚😉👍🏼🤯🤯

I would give it more time. Much of how it performs is based on genetics. Flushing is a tool for correcting a catastrophic issue in the substrate. If that's not an issue its not going to fix anything. Plants don't piss out excess, or leach it away with more water. All it is doing is starving them and sowing growth. can't make something out of nothing. Giving just water with no runoff is fine last week of life. Let is use up what it has in the pot. To run copious amounts of water though the pot though, wasteful and useless. Even end of life stressors to increase trichomes and stuff take time and energy, Something it does not have a lot of in the last few weeks. Just let it be, if it hits, good, if not find a new strain. Good Luck!

yes i think about 3 weeks to go :) also buds will increase in size when you flush with plain water 🌱💚