Qush problems

Hey guys,
Im mothering out 4 TGA Qush plants. I have them about 6 inchs under a 400 MH. I can comfortably have my hand under the light.
Im noticing some twisted growth and some curling of the leaf sides.
Is this heat stress?
Also noticing they are VERY short plants compared to what ive seen other growers of Qush.

What u mean your mothering them out ?? Dont worry about the wrinkle some plants do this, if you want longer nodes change to a HPS.

The change in leaf shape/ growth patterns look like a boron def to me.

curved edges like that COULD be nitrogen toxicity/deficiency. But there are also other things im sure it could be that i have no clue of.