Just to jump in with my .02, I don't even start LST'ing mine until they go to 12/12. They are a short and bushy Indica strain with close internodes so I need the growth spurt in the beginning of 12/12 to train. At that point my stems are soft and take readily to bending. Within a few hours the bent over tops will turn and head for the "sun" again, it's fast.
There is a window in the first 2 weeks of 12/12 that seems to be just right for this, though I will continue all the way until the end if required for space.
Bear in mind my plants are typically about 10-12"s when they go 12/12. At 1 month they range from 4"s to 8"s..... 2 month's about 8"s to 12"s from dirt. With a sativa strain
I would guess you would need to start in veg so the branches get trained before they get too tall and "stick" like. Either way, your girls look frickin' awesome!