I don’t know squat about auto flowerers but that 3 gal “pot” is way too big for those seedlings,
proceed cautiously with your watering.
Also, tsp/gal of Maxigro is a pretty strong formula for tiny seedlings.
Autoflowers should be put in there finishing pots as you got no time for error transplanting them will stunt there growth just what I've read about autos
Yes. Plant in final pot. Some choose not to, but most I have seen choose to plant them in their final pot. Also, I'm not a coco guy, but I'm pretty sure you needed to add quite a bit of perlite to your soil.
I always wanted to grow Durban, good luck.
Looking good man. Will be interesting to see how they turn out. Most people that do grow autos indeed grow them in 2-3 + gallon or bigger pots. The bigger the better. If you want a ton of good info head over to AFN they have plenty of grow threads completed that show crazy yields in much bigger pots indoors. One guy was growing the auto Ultimate got over 1000 grams indoors in a 5 gallon pot. Few others have gotten 500+ grams from it. LST her and you should see some good yields if done correctly if the genetics are good. Perlite helps for sure, usually at about 1/3 of the soil or coco. Happy growing all.