Complex sentence: At this point, most of Hendrix's and Eddie Kramer's time was taken up with (Hendrix only) overdubs and mixing of the studio tracks, as well as the beginning of the very long mixing and editing for the finished LP.
Split into simpler sentences: At this point most of Hendrix'and Eddie Kramer's time was taken up with (Hendrix only) overdubs and mixing of the studio tracks. As well as the beginning of the very long mixing and editing for the finished LP.