If I understand what youre talking about...a cutting will be the same sex as the donor ie the Kayas will always be females.
Regarding timing of flush, that's a challenge when running multiple strains. My room is on a 10 week cycle. . I start flushing after 8 weeks. It works good enough for me and I just don't have the time to fine tune each strains feed schedule
I know the Kayas and gg4's will all be females. But I need to sex some Malawi and Yeti Fuel seedlings. I trimmed the moms for my GG4's and Kaya's and decided to use the cuttings to clone them to get more practice at that and to see what worked the quickest for showing sex, putting them immediately into 12/12, vs rooting them out and them going 12/12 as soon as roots showed
I haven't had a chance to look over the pictures of the buds for the different strains, so I don't yet know if they'll be helpful. Just got in to the hotel. Had all the seats next to me empty so I laid down and slept for three hours. That nap and being west coast time will mean I probably won't be able to sleep tonight