I really liked this one!
My first exit touches were at 500+, LOL. :)))
My finall path has two variations (in one small part), but that didn't bother me.
I can't find the last 4 steps (for 257). Will keep looking! :)
Very nice structure, with plenty of options.
EDIT (about half an hour later): Finally got it! (Had a two off, too, first, but it was just me, doing an extra move, for nothing. LOL)