Metallica - "Eye of the beholder" riff recorded with 8 guitars (Experiment)

I read that James Hetfield recorded the “...And Justice for All“ album with 6-8 rhythm guitars. On different amps with different sounds on top of each other... So I just wanted to try it myself 😎 (With different sounds, but this is recorded with the Bias FX2 Iphone app) And I think I am even more impressed of James now... But I was also a little suprised that it sounded more tight with all 8 guitars. But I picked a pretty easy riff on the Justice album... James did this with the faster songs! ONE for example: “(...)Then, when we got to the machine‑gun part with the double bass drums, we began layering rhythm guitar tracks. By the end of the song there were six or eight rhythm guitars, played by James on different amps with different sounds on top of each other. However, he was so tight that this just sounded like one big wall of guitars. And if anything needed to be punched in, he’d just go back and pick it up right away. He was extremely fa