Ray Manzarek (not sure of the spelling), played kbs for the Doors, but he also utilized a walking bass (foot).I was fortunate enought to catch them live in Toronto, many moons ago. It was amazing to watch.
There was literally, never a "dull" moment in his playing. Busier than a one legged guy in a butt kickin' contest!
btw...when I saw them he was using a Vox Continental + the Farfisa+ a third unit which I couldn't make out, but it may have been a Hohner. Great show. I never really cared for Morrison too much but Manzarek always impressed me. Might even have been him that slipped me the bug!

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...L