Growth is exiting. Go away for a week again and you can be excited again.
Plants grow slower than paint dries
Is your soil moist when you lightly scrape the top?
If YES, I would wait to let roots grow more.
If NO, since your final pots are deeper, I would transplant both so they have more room to grow roots.
For your AK47 clone, I would let her grow about 3" taller, then take your clone of about 4" right off the top (above a good pair of branches) for doing the early flower.
Gold Bar Kush hasn't really made a shape yet - but probably the same thing. I like taking a large clone from the top budsite - it grows faster and more evenly
The size of your clone depends a bit on your cloning method. I suggest a bucket (splash) cloner, a bubble cloner, or LembaToast's baggie and breath method.
Good - It's probably OK just to watch it for a couple of days.
If it stays the same - great!
If it grows a little bigger, cut off that lobe of the leaf between the light patch and the stem, throw it away and wash hands and scissors with soap.
If it skips to another leaf, you will probably need to start a treatment.
6'6" is plenty of height for the size pots you have - especially if you want to do a bit of training.
Your next training decision is how high you want to train your plants. Most of my experience is with a starting canopy between 16-24" high. Since you have 2 plants, it's sort of a decision based on how those two girls grow. This grow, the way the girls have been growing, I'm aiming for canopies about 12-14" tall. The shorter canopies grow less different than I expected
It looks like you had more energy than you thought
I'm less concerned about reflective surfaces than others. I'd paint a plywood door white, but your shiny walls are OK as long as your leaves don't get burnt. I've heard that shiny walls can reflect too much of a bright light.
For my own rooms I painted the brick walls to control dust and crumbling brick. As long as I was painting, I went with a flat white primer. My plywood doors and some walls are still just plywood