I did repot young, only 4 weeks ago, 2 weeks veg to adjust to soil and topping then, 2 weeks flower. So only 11 weeks in these pots when I chop em down. Does that sound about right? I can't believe that they could have used up all the soil space in just 4 weeks?
Also who's the super hero guy in the pic? Just reminded me of a child hood cartoon "The Tick"
THE TICK was awesome! Such a good show. My avatar is Space Ghost from the old days. In the early days of Cartoon Network he was on late all the time. Look up Space Ghost: Coast to Coast. Hilarious stuff.
As far as repotting young, I germ/sprout in 3 inch pots and then, as soon as I see the taproot coming out of the bottom of those, they go into 8 gallon pots buried up to the first node. When I transplant I make sure to do so as high up as possible in the new pot so that the roots have as much room as they can to grow and spread. This grow I'm using fabric shopping bags as a sort of poor man's smart pot and they seem to be working like a charm. The plants are loving it up.
As far as being on the right track.....
Your plants look happy and healthy. I would recommend getting some actual mylar to line your grow space though, and it WILL make a difference. That and some bigger pots and you'll be more than happy. And as long as you have some smoke and some more experience in the end, you will be anyways. Keep it up.