plant like to get bushy in this system, lots of side branching, one thing about size is in hydro pot size doesnt matter as much as if it were soil, 4footers finished is perfect, 3-4 weeks of veg with a good topping is even better. you can top the plants at 2 weeks into veg, this will give side branching to join the canopy and you will have a great yield, by accident you should be looking at 70g dried, dialed in and strain i dont see how you cant get 6oz per pot. since they get bushy you might want to give them space, it looks like its getting crowded in there so i guess its all about your desired size of plant and such, also for your next run depending on if you have flimsy branches you mitgh want to consider tomato cages, those look rock solid so it dont look like it needs support