I just wanted to make sure I didn't put a negative spin on this, or to seem like I'm bombing your idea or creativity. You may have an insight that I do not have to your grow.
What are all your thoughts on your DWC system and how are you planning to curve; or do you not think with your strain or grow technique that these problems will arise?
4 x 1 gallon dwc, are they linked together? If not, wouldn't there be higher probability of big nute and ph swings when the plants start pulling up to half gallon a piece a day when they hit that spurt and into flower. (Maybe not, if you can keep them bellow 10 inches. [problem solving thought])
*I'm only writing from one grow and the challenges that I see with my autos. You may or probably do know way more than me. Or if you are like me you will see this as another challenge to overcome and come up with an easy solution to do it how you think is best and make it work for you.