(sometime in March, 2023): I'm like ''forever'' 4 off (at 72) and find this one far the hardest of the three. Will keep trying, nevertheless. :))
EDIT, 16th Sept, 2023: I finally found the 68 path, too. Very nice one!
Very cool level! This was my favorite, maybe because I solved it first. Interesting series but the second and third felt much easier after tackling one.
EDIT: Hmm, not sure where this 68 is...