Looking really good my friend. I would have liked to have seen more growth for you for 5 weeks veg time, but like you said you may have had some stunting issues after trying to FIM them. I haven't tried that technique myself yet, mostly cause I haven't really needed to. But I would like to just to see the results. I've heard amazing things about it. turning one top in to 6 tops, that awesome!
I'm happy to hear you're ready to move to 12/12... You'll still get some good growth for the first two weeks of 12/12. Especially as each cola branches out to claim it's space before flowering. It's a beautiful time.
Keep us posted, brutha!