@grzesiekkuzniak, I've developed my system over 6 years of growing 24/7, for me this is what works best on a big picture and it suits my setup.
And I save at least 2-3 weeks veg time. Roots do get tangled but that doesnt really matter when they have enough space to do it on ;)
I only do singles on rare occasions when circumstances calls for it (like I will separate my big bud autos next week and run them in single buckets).
@TheUsualSuspect,you will not save any time..........................roots will get tangled........................btw ..............you might wanna trim your root runners
@grzesiekkuzniak, me too ;) I dont think I can ever go back to soil or coco. It's just as pointless as going to the gym without a healthy dose of steroids in your system. lol