You're aware that they'll continue to grow once flowering begins?

As in...substantial growth. Not an overly bad thing of course...just have a mind toward home much room is over their tops. The rule of thumb indoors is 12'' or 3-4 weeks of veg.

The two perks about going into flowering early...preventing your plants from out growing the space available...but more importantly...determing individual sex asap for sake of things like, saving on nutes, and not wasting electricity on what might be (clones aside) a crop of males.

I'd go apeshit if I sat on plants for nearly two months to find out I've got a squad of males!