No no no no no no NO! All wrong! First, too much distortion. Not enough mid. Not enough bass. No he was not using the treble booster. He had given that up a little over a year before. No he was not using the Awai, that was to come in another 3 years with MKIII. He hadn't used a Revox since the 60's. The Vox thing has been floated for years ever since Ritchie said he had an AC30 mounted in a Marshall cabinet. Nobody ever saw this.... Nobody. People swear that they see it in old videos and circle it and point arrows at it. What they see is actually a Marshall reverb unit that he would bash with his guitar to make a glorious noise. Ritchie also used to say that his Majors had extra output tubes and that they produced over 400 watts.... Ah no. For Machine Head he was using the Major with the latest mods from Marshall. The sag he is talking about was from the mod and I was sworn to secrecy. Yes Ritchie finger picked the riff, but this guy is doing it all wrong! Ritchie was VERY percussive with this riff using his thumb and three fingers almost in a popping bass player motion. His thumb naturally dropped between the E and A and that is where you get that fingernail squawk before he picks the chord.
Other than that, he was right! rookie....
Jim