Funny one! I did study a bit the board before to start, what helped me spotting something "behind the obvious". Thanks to it, I was 2 off on first try and needed a few more tries to cut the 2 steps, that are a different way to go at a certain location. :D
The upper part was kind of easy for me, but the lower part was a different story. I first had only a 170 path, later I found THREE different 168s, and then with a really strange combination got the 166. This was really VERY WEIRD. LOL :))