I like your pictures, but you should maybe pluck a small bud off and give it the same close up shots. Most of my plants will have amber on the sugar leaves but won't have any on the buds yet.
I'd say you've got at least about 2 weeks left, so you could feed once and then switch to water after that. It seems like most auto varieties land somewhere close to like 80-85 days from seed, but each stain is different and each seed too. Possibly see if there's an estimated time for your strain.
✌️ happy harvesting.