I had two different 66s. Then I tried one of them in another way (that I would NOT expect to be shorter) and it proved to be the right thing. Very nice path!
I loved this level! But had serious troubles, finding the 532. My path here was 550, for quite some time. Then I progressed to 546, 540 and 536, where I got stuck again. I figured where I was loosing and finally managed to get that section right.
I love the way this level looks. I have a visually simmilar level in my ''drawer'' (not published), but it's a very different path, there. Maybe I'll publish, some day. :)