The following artists made significant vocal contributions to the album, but are generally not considered regular members of the band; therefore, they currently have the "guest" attribute flagged on their performance ARs:
LD Beghtol, Dudley Klute and Shirley Simms.
Suboptimal AR credits:
Track 12, "Promises of Eternity": Chris Ewen plays the instruments and provides the backing track. (Currently credit as: guest performed by Chris Ewen.)