I have never heard that song, at least I do not remember hearing it. So I need to take a look at that, but pieces can be complex that is for sure. I always get creeped out that I am going to blow it when I get into a band and first get on stage. Just screw up the entire piece. So yeah. Last night I just memorized the whole "Take Five" Jazz piece on guitar. I did what you were saying, where you play the piece over and over till your fingers memorize it. But I still got to get the rhythm values down.
"I am the Unforgiven"