The reason it took a week or two to sex after the switch to 12/12, is the transition time. If you go 12/12 from seed, the plant will still need to become sexually mature before if shows, and you decide to grow or throw. It takes roughly a month for this to happen. The 12/12 thread will have alot of info in it for you. You will just have to wade through all the posts to find what you want. Or do like the rest and just ask. Being as you have bagseed, go for it. If it was a bought, stable strain, I wouldn't do it personally (12/12),as I would want the most bang for buck.