overgrown roots (emergency help)

That's not rootbound. Just make sure it doesn't sit in its piss, and those roots will remain healthy -- pot elevator or something so that it doesn't sit in its own runoff for long periods of time -- just a good practice in general, too. Roots will air-prune better that way. you can tell where more moisture was by root pattern. 11L is plenty for an autoflower. irrigation procedure 1) fully saturate 2) wait for healthy dryback and repeat. you don't choose the volume of water to give. you give what it takes to complete step 1... based on the one week you have posted, it seems like this is relevant to bring up, but could be wrong.

Just had a quick look over your diary and there is a few things I would recommend. Firstly if you don't star using cal/mag soon you will run into trouble real quick.. The leaves that have been burned at the bottom remove the 1s touching the coco or up against the sides not getting light your creating breading sites for n mold. You could do with trays under your pots with a wedge underneath the back end so the over spill rolls to the front or extraction, this will eliminate your roots growing on the outside of the pots and run off into the wind never to be seen. That last bit was a joke but they look health part from said above.. Grow on mate. Best of luck

Congratulations you now grow hydroponics.. Nice healthy roots I see

Nothing to worry about indeed, just make sure not to let them sit in the water from the drip tray. If you notice any browning, cut off the moldy tips. Ideally, choose clothe pots next time : you’ll never have this problem again!