Well I like to recycle what I have rather then buying a lot of the same products. The old system would have smaller pots yes, but from what I read for a 4-6 foot tall plant it only needs like 2 weeks of veg before the flip due to the increase of nutes/water uptake. So if you stuck with the smaller pots you'd be able to cut the veg time down even more because the plant wont be as big(3.5-4 ft). Then you'd be able to flip to flower quicker. Kinda like a flood table where you keep your plant number high while cutting down the veg time. Also it wouldn't be hard to convert it just drill a bunch of holes on the opposite side lol, since they have a drain hole already. Maybe I'm not grasping the full concept yet? Lol
One things for sure, I love learning new techniques.