SOB!!! i just had everything typed out and hit the wrong button >_< ok so lets try this again lol... if i were you id swap the light timing to 24/0 now, better to get used to it now then let the plant have more stretch time. also i would get some twist ties or pipe cleaners and tie down just about every branch attempting to lower the canopy about 4 inches or so, that way theres room for it to grow over the next 3 or 4 weeks as the flowering plant finishes up, with that said i would also top all of the larger branches, this will also help stunt the vertical growth for a few weeks as the plant repairs damage, as well as increasing the amount of tops (colas) you have thus increasing yield a bit... i think we all have been in the same place your at now, full flower space and an overgrown veg space, just gotta do some LST, tie them suckers down and top branches, just make sure you give it at least 2 weeks to recover from the toppings before you move it into flower. also looks like that vegging gal could use a little skirt trim if you will... looks like her underside could get cleaned up a bit, looks a tad over crowded under that canopy... just some food for thought...