Its mainly all milky, If you chopped now you would not be disappointed at all, just would have a lot more heady high feel vs body stone feel.
I would give it a week or two more and then chop.
I would also try and chop at same time as other plants, but if its not possible then a week apart should be fine. Just makes it annoying for drying and trimming times.
As for flushing I am not a huge fan, I feel its myth and only needed when you over feed something as a mistake.
Best Of Luck!
***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details:
growdiaries.com/giveaways/GotM-August-2022
Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***