First drain-to-waste setup rockwool

As the title says this will be my first DtW setup and I don't know wat I'm doing really.

My plan is to have 9 plants in a 4x4/5x5 6inch cubes. To start I know I need some sort of 4x4 or 5x5 flood tray and obviously the rockwool. I don't really know where to start from there.

I would like to eventually setup an automatic feed system. Something small scale, nothing too technical. For now, I'm okay with hand watering. If anyone can help guide me with actually building the system (automated feed and flood tray)

why 9 plants?
a 4x4 would maybe handle 4 plants the way I grow.

J. Rocket said:

why 9 plants?
a 4x4 would maybe handle 4 plants the way I grow.

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I'm not totally fixed to 9, I figured I could get away with shorter veg times and quicker turnarounds

phantom grower said:

I'm not totally fixed to 9, I figured I could get away with shorter veg times and quicker turnarounds

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my suggestion would be dont start off being in a hurry.
I'm only vegging for about 4-5 weeks from first leaves as it is. cant save significant time there.
bulk of the time is once the schedule flips to flowering/ 12/12 and you cant really hurry that up.