2nd Grow under way, Northern Lights X Pakistan Ryder, Pakistan Ryder 400w

I started my second grow with the seeds I grew from my first. a hermied Pakistan Ryder pollinated a female Northern Lights. the three plants that are coming along are:
1. Pakistan Ryder (Auto)
2. Northern Lights x Pakistan Ryder (Auto)
3. Northern Lights x Pakistan Ryder (Photo)

So far there is only one autoflowering NLxPR but some may show up later. Heres what im using for my grow thus far:

Light: 400w Hps for veg and flower
Nutes: Earth Juice grow and bloom, CalMag+, Molasses
Soil: FFOF

Heres a few pics at day 23 from seed after being transplanted from cups.

23 days from seed (2).jpg23 days from seed.jpg

there are more to be transplanted in the next week or so (the plants still in cups, pic 1 on the left).
I plan to do a scrog in order to maximize yield, i'll be building a screen hopefully this week.

I will update this journal every week with pics, comments are welcome.

Update Day 38 of 18/6

I put in the screen last night, I plan on giving one more full week of 18/6 and then switch to 12/12 over the course of 3 days or so. Here's a pic update after the screen was in.

Day 38 from seed (1).jpgDay 38 from seed (2).jpgDay 38 from seed (3).jpgDay 38 from seed (4).jpgDay 38 from seed (5).jpg

I got a question. 4 of the plants are showing sex and 2 have been for 2 weeks already, when i make the flip to 12/12 will they still stretch? or are they already trying to bulk up and flower rather than veg? My question is, will plants showing preflowers for that long still stretch or are they done growing already.