Like all true Metallica fans, one must eventually learn Master of Puppets.

My question for downpicking is where does the motion come from? The wrist? I can't seem to get it from anywhere else.

And when I do get it, my whooole right arm tenses up. I suppose this means I need to slow down and work at a slower tempo until I can play it relaxed doesn't it? Bah.

Thanks.

Yeah you need to slow down until your hand is relaxed and practice at that tempo..Eventually you will bring it up to speed....

Why don't you take a look how James hetfield plays it and copy it. But realy it's your own preferance how you can do it best.

It means just that you got it

If you want to learn it downpicking then go on, but James actually uses alternate live. I can't really tell the difference between downpicking and alternate at that speed so i don't see the point in doing it downpicking, but if you think it sounds better then the only advice i can give is to keep your arm and hand relaxed all the time and your speed will imcrease.