"Fireking Says No Cheating" from Suitcase 3 was previously the only known Circus Devils outtake with vocals, according to Todd Tobias. But, Bob had this song "Back To The Diving Board" which ended up being another outtake with vocals. Todd only has a clean instrumental version of it, and of "Fireking". Bob's version of each of those songs that contain vocals both have noise due to a bad CD-burner, which was not intentional. Year recorded was probably 2002.
Other notes on the song from Todd Tobias:
"I think that song was a contender for The Harold Pig Memorial."