Same than Devil for me: stuck 2 off and not seeing how to cut...
** 2 years later **
Got it! For me the trick was to take a 2 years break from it. I came back to it today and got it on 2nd try. :D
Wow, this path is incredibly finicky. I had a path that was 2-off for a while, and ********************************************************************** But the optimizations needed to actually get there are really minor and detailed, and were quite hard to find. Cool level.