the contorting leaves can be a sign of too high ph which in turn could cause various nutrient lockouts which could be causing the leaf damage. as you pointed out, the hps makes the pics a ittle difficult to see properly but i still think high ph could be a possibility and that is easy enough to test. if i were you i would check the ph(if you haven't already) before adding anything to try to correct any defficiencies. if you do find out that it is a defficiencie a product i have had alot of luck with is mineral matrix from bio-genisis, it's 100% organic and seems to work great in correcting alot of micronutrient defficiencies. i hope this could be of some help to you. good luck opie!