During 1998, the group played a national support tour with Ozzy Osbourne and late in the year Buckley was asked to leave due to personal issues, opening the door to Adrian Herbert. Segression toured with Strapping Young Lad soon after, and with this new line-up, Segression then headlined one of the first annual Australian Metal Festivals Metal for the Brain.
In 1998, the group toured nationally with Ozzy Osbourne as support. By year's end, Buckley was removed from the band due to personal issues, allowing Adrian Herbert to join. With this new lineup, Segregation then headlined one of Australia's first Metal Festivals known as Metal for the Brain.