My understanding is that Jimi played bass on a lot of the tracks on Electric Lady land as Noel Redding was , alledgedly, more interested in being down the pub.
Through stuff gleaned from the net and various documentaries over the years it seems like Hendrix wrote a lot of the bass lines for Redding, also that he had played in several bands in the old days purely as the bass player.
Already set my recorder too.