[2] He has also performed session work on a plethora of albums by other artists, including those of his former Aphrodite's Child bandmates, throughout the 1970s and 1980s, and in recent decades he has released solo recordings under his own name.
[4] Because he was in the Greek Army at the time, Koulouris was able to play with The Idols only occasionally,[4] but he maintained a connection with Roussos and Sideras that would prove to be key to his future musical career.
As the band prepared to travel to England to find greater success, Koulouris' military obligations once again impeded his musical career, and he had to stay in Greece while the remaining three established Aphrodite's Child further west.
[7] Due to conflict within the band and tensions with their record label, Aphrodite's Child had broken up by the time the album was released,[4] so Koulouris was left to find a new musical direction for himself.
[10] Koulouris did session work on additional solo albums by Roussos and Vangelis[11] and also played for fellow Greek musician Harris Chalkitis,[11] who had assisted in the completion of 666.