4th Week flowering

Hey all this is my first post on this site, have been reading quiet a bit and following some posts but have not participated till now.

I'm on my first grow and coming up to half way through my first plant and am looking for a bit of advice....

Grow:
Xl Homebox
9 Feminized Power Plants
11lt Pots
All-mix Soil
Bio-Bizz Nutrients
Ph: 6.5
100mm RVK Extractor fan with Carbon Filter
600watt HPS

My Question is does this plant look ok?

I know this might sound like a very newbie question but i am a bit worried as it is comming to the end of my grow and i dont want it to go horribly wrong now!!!

The leaves on the upper cola seem to be always drooping down but not as a over watered droop or an under water droop.Was just wondering if this is ok and normal or have i got a problem on my hands

So any help is greatly appreciated
Thank you Guys

Do you know what the EC is of your soil run off?
Its hard to tell from the pic whats happening with your leaves, are you able to pull the plant out into the normal light and take a photo so the lines from the ballast arent interferring with the photo. Try a photo from on top so we can see the veins and color of the leaves.