Their second album, "Milesago", was released in December 1971, as the first Australian rock music double album. It is also the first Australian rock album to be recorded using a 16-track recorder – newly installed – at Armstrong Studios during the previous September. McFarlane stated that it "remains one of the landmark releases of the Australian progressive rock era." It peaked at No. 9 on the "Go-Set" Top 20 Albums chart. By September 1972 Neale had left both bands; he was replaced by John Mills on keyboards. Neale quit the music scene permanently after leaving Spectrum and Indelible Murtceps.