I've crafted a few +1 items just while skilling up, mostly weaving, and haven't noticed any hard rules on getting a HQ versus a NQ. At first I thought it was higher quality gets you a HQ but it seems to be that the higher the durability is when you finish the better the odds are of HQ. I've finished an item with 465 quality (i used some +3 mats) and 27 durability and still got a NQ. I made the same item and finished with 85 durability and 17 quality and got a HQ +1.
I looked for threads about this in the previous pages but found nothing. Does anyone have some good info on getting HQ results?
Wish I could play the game, instead, the patch won't even initialize, just sits there staring at me....oh well, at least this month is free.