There is always more than meets the ear - so to speak - with Ritchie's stuff. I've seen alternate camera footage of Ritchie playing that classical riff looking around smiling or his eyes were closed. I cant play it staring at the neck.... Again, the counterpoint to Jon's solo is brilliant!
That rainbow was the Cal Jam logo. Supposedly, this is what gave Ritchie his idea for the name of his solo project and also that disaster of a light show rainbow that he used in the 70's. It was built by SeeFactor and was fired by SCR's that made such a racket, his sound guys were ready to kill him. It had to be completely turned off for the quiet parts and many times did not work at all. Dawk was working overtime to shield his amps and his Strats, try different pickups, and ultimately found the radar paint that we see Stewmac selling today. I posted another video of Ritchie playing a beautiful quiet intro to Over the Rainbow. Notice the Rainbow was turned off!
HOWEVER, the slightly inflated ego of Coverdale insists it was his lyrics in Stormbringer "...ride the rainbow....rainbow shaker..." that inspired Ritchie to name his band. Yeah......
I've played my single head through all four 4x12 cabinets at a couple of outdoor gigs and that was an awesome experience. My bass player had an SVT and it had to be miced.

Dawk was really pushing those heads running the KT88s way over spec. Dawk said he had to re-tube about every two weeks. Then there were the transformer fires..... Ritchie played that natural finish maple neck for several years and I think he dropped and broke it sometime early Rainbow. Dawk said he was pissed but found he liked the rosewoods better. I think he could have played a tub thumper and made it sound good. I mean after all, he did pick up that hollow tele for Blackmore's Night....
Jim