I dont have a real answer for your question, because I do not know exactly how it works. You dont have to touch the line but my slide was probably on the very edge. I too struggle with a consistent powerslide so I cant really explain it, but I can tell you its a legit run. I have two more runs under 1.6 and I guess a few videos with similar powerslides but I am aware that this is one of the best possible last sectors.