i just use lst and topping while in the veg chamber and put them under the screen when i move them to the flower chamber. the only thing is that i leave the lights on 18/6 in the flower cab for the 1st week or so depending on how full the screen is. so your idea is the same as what i do and my scrogs produce pretty good yeilds. and good quality buds. alot of bic lighter size buds instead of fewer donkey dicks. i really don't care about having big buds so it doesn't matter to me. 14oz of smaller buds is better than 10oz of bigger buds as far as i'm concerned.