Here is the system I used for my first 2 runs:
My first run had 2 Fruit Punch and they responded very differently to the nutrients.
One took 20 days longer than the other and one had Nitrogen Toxicity and CalMag issues while the other didn't.
This is why I wouldn't recommend running Autos in an RDWC with a shared res - not saying it can't be done, but it can be extremely difficult to balance.
When you are running Autos from seed, at best, you will only be running 'fraternal twins' - not 'identical twins', so their needs can (and usually will) be different.
It is a balancing act trying to get the feed so that it is decent for everyone.
Running Photoperiods from clones though, you KNOW that every single plant is identical, so the feed can be perfect for them all.
This grow, I am only running a single plant, so I won't have those issues.
In saying that, plenty of people run RDWC with autos without major issues (including things like
Having said all that, plenty of people run RDWC systems and things like Autopots (same res, multiple pots) without major issues...