No nutrients started yet, water at 6.5 pH. Do Si Dos still smaller than other two but looks ok. This weekend will perform LST by bending the top over. I also have two Candy Cain Auto that I started at the same time that are about the same size and development as the others but they are in 5 gallon pots. I am testing over all growth between the 3 and 5 gallon grow conditions. The 5 gallon cloth with the auto water bases are keeping the bottom of the soil damp so far so they take a bit less water. When i am sure the roots are down to the bottom i will fill the reservoirs.
You'll have mixed results. Autos can be tricky. No stress is the key in veg stage. No defoliations until you get near the pre fower stage. And you should be golden jst treat it like a fem after the flip. + micro nutes for the RR.
Good luck hope you've a good experience.