If your gonna do it, be very very gentle with her root base(obviously you know that!=)) , you do for sure risk stressing the plant tremendously, but if your careful you can very much limit the shock. definitely not recommended, but sometimes you got to do what you got to do (I know how that goes and it aint a great feeling !). A top grower would advise transplantation no later than two weeks BEFORE you start 12/12 light schedule, but like you know now, sometimes it's a rock or a hard place so somethings got to give. In the past I have seen late transplant stress, eased by various products such as ZHO root inoculant or Great White, in combo with one of these products, I would recommend Roots accelerator by House and Garden and also H&G's foliar spray product: Magic Green (works great for plant stress in general- it's magic =)), and old tyme' Superthrive at a 1/2 dose added to your normal feed batch. good luck bro, if yer careful (which imo if your concerned enough to ask- you treat yer girls good, so you will be careful off of instinct alone) she will be fine. any possibility of keeping her in the container she is in, ripping out the bottom and transplanting her without removing her from the container she is in?