He is a seriously underrated bass player. I learned tons of his stuff with Purple back in my early days as a bassist in the 1970s.
He was also the first (and only) player I ever remember using a _double_ Marshall Major stack, if I remember the cover of Made in Japan correctly. Lordy Lu, that rig must have been able to pulverize stone at 100 feet considering he played a Rick (with roundwounds) pickstyle. Yipes!
No wonder Purple hit 130 dB on stage. Nothing succeeds like excess.