Excellent grow man....I have a few PBK's as well in week 4 of flowering. And yes...the sugar...I mean the triches are ridiculous. Looks like someone dropped a bag of confetti sugar on the leaves. I have noticed that the leaves began to claw, probably like a week ago. At first I thought they were thirsty, but that wasn't it. I noticed the same thing in your pics...I'm assuming it's in the genetics.