thanks for the comments
things are still growing fast,i had to move the light up another 2 links so only 6 left now,gave them some nutes today,mixture of 8-36-34 and 12-36-14
the leaves have started to get small and skinny on top and have started fusing into buds,so vertical growth should slow,or at least i hope so,the biggest plant has more than doubled in 2 weeks,there's even a few trichromes on show and it's starting to smell nice
anyway a couple of pics