hows the plants doing mate, just trying to get caught up with all these journals so just having a quick flick through the pages,
you know your going 12-12 to show sex, well to be honest they dont show sex that much quicker to be fair, a plant needs to mature before it shows sex and they do this in veg schedule, the only schedules i find that take longer to show sex is 24-0 which seems not to show sex until you flip 12-12, 20-4 seems to take a long time as well, but 18-6 or 17-7 seems to show sex around the same time as going 12-12 from seeds, my plants under 18-6 usually show sex at around week 6 or when their about 1ft high, plants are usually mature at about week 6 depending on strains, indicas usually show sex early, well at least mine seem to, the sativas seems to take a week or 2 longer and they also take longer to flower.
your ok going 12-12 till they show sex so stick with that if you are going down that route but i find the difference is not much compared with 18-6, both mature around week 6 from seed and both schedules show sex at pretty much the same time, all plant show sex in veg so you dont need to have them under 12-12 to sex them, females will grow the pistils during veg at the nodes and the males grow bunches of grapes which wont open until you go 12-12,
looking back through the pics are you over watering by any chance, some of the problems you was having a few pages back seem to be due to over watering, its best to let the growing medium dry out before each watering, the roots need oxygen as much as they need water so its best to let the medium totally dry out between waterings,
this time round ive tried something different, i usually water every 4 or 5 days but ive let them go longer this time round and let the pots totally dry out so when i pick the pots up they weight nothing, my plants seem to be growing twice as quick now im letting the soil dry out more