I was browsing covers and live shows when YouTube put this on my Recommended list. I wanted to learn to play this song for a VERY long time, probably since I discovered Bullet and it's nice to find such "official" playthrough to be sure BUT when I realized the main riff is supposed to be all downpicked... I lost it. And I thought Master of Puppets or Blackened are a challenge. Getting to this level will take at least half a decade but that's all the more reason to keep practicing! Can anyone give me some advice on how to practice to rev up downpicking and AP speed without destroying my hand's joints?