Great 57 by David, here. I wasn't able to see it very fast. :) Was stuck 4 or 6 off. Not sure why I couldn't see it before. Was stuck at 73s.
Very good one, IMO. I was stuck at 56 for qite some time, here.
Such a nice 52 solution! :) Fabulous solution by yokosooo!
I had serious troubles finding the 57 path. :))
(I mostly had 63s and 61, before that.)
Great level! I got stumped here, for a while. Quite tricky! :)) Took me many many tries to get this right Same as alazeh, got 2 off before solving. 
Insights