How much longer would you wait to flip to 12/12??

Hello...I have another newbie question for you guys. I have asked several questions and gotten great advice. You can see by my plants that I'm doing something right, which is doing not much at all!
Today's question is when to flip to flower? I am on day 32 of vegging my 7 feminized White Widows, one which is much more sativa looking than her indica dominate sisters. I'm not going to worry about her as I've decided to let her do her thing, she's a wild child. The rest range from 8-10" and appear to be exploding underneath with lots of bushy 11 finger leaves. I can see female hairs in a couple and I anticipate the other showing today or tomorrow. I would like to keep them on the short side, no more than 36" above the soil, but I'm starting to worry about horizontal growth. My closet is 4x5 and I want to avoid issues with overcrowding. I plan on flowering for 9-10 weeks. I have a 10 day window to flip. What do you guys think? Tell me how they look!
Thanks again

The first picture shows how wide they are getting and the new leaf formations that are showing up EVERYWHERE!
The second is a side view of the same girl showing the under growth
3, 4 and 5 are side and top views of the girls (notice that bad girl Grumpy doing her own thing)

When you flip the light, the plant will begin stretch to build the stem for the cola bract. This is technically a bract flower, like a hop plant.

So, gotta make the stem length for the flowers to fill in. I figure I can get a 25" plant in 8 weeks, and that will finish at about 36" for bloom.

you have your own question. You want to finish at less than 36" so flip when you get to about 14". No brainer.