Hey! It's you again. I PM'd you about this question, but I'll answer it here too, lol. Just drop me a line if there's anything further.
You're plants look really good, and they're close to the flip. With their size, alone, I would probably let them go another week or two just to bulk up and spread out a little more. You're running an 18 day cycle so you should be seeing pistils by now? If not, do not flip, if yes you can whenever you'd like. Myself and others agree that if you can get more veg time, use it. Plant can only get bigger and healthier before the flip. IF you have space, let them go for awhile. They're in hard veg right now and I wouldn't stop it. You can pull the trigger anytime, but they seem happy and can definitely stand to grow a little more before you pull that trigger.
I'll be in PM if you need me, if this helped, or if you need/want something else.
Cheers, and again, happy grows✊👍