Hey There looking good!. Anyway factor in the breeders expected time and with that in mind watch for the hairs to start turning orange/brown also watch for the calyxes to start swelling up, some strains do it more than others. Then keep an eye on the older fan leaves as they will start yellowing (almost looks like Nitrogen. def.) due to the plant sucking all the stored nutes from there to send to the bud sites, Now there are times this won't happen due to being fed enough nutrients that it does not need nor want to pull it from the leaves, but generally it will happen. Once it is doing that and at least half if not a little more ~65-75% of the hairs are orange and not much new growth of white hairs you are most likely within a cpl weeks of harvest. Another good way is to watch the trichomes with a jewelers loupe or pocket microscope to see them turn from clear to mostly cloudy with some clear and you should be a cpl weeks out. I usually wont start using the microscope until most of the hairs have turned from snow white to orange, unless I cut a little sugar leaf off but the trich's on the sugar leaves seem to ripen a tid bit faster than the ones on the calyxes but it still gives a good idea of where the plant is at. So watching for those things and the breeders estimated time in mind you should be able to gauge when your about 2 weeks out. what I do when notice a little over half the hairs turning orange is start lowering the nutes a cpl mL/gal ever other day instead of just cutting them off right that day then once about 75% of the hairs are orange start to flush it seems to work well for me👍 Plus as you grow a strain a time or two or grow a different strain that has similar traits you will kinda be able to judge it fairly accurate how far out just by looking it over real quick hope this help 👍
Happy Growing😎
HoffGuyy