Conversation so far:
What were beginning years like for the Nitty Gritty Dirt Band?
As Nitty Gritty Dirt Band, the six men started as a jug band and adopted the burgeoning southern California folk rock musical style, and playing in local clubs.
Who were the founding members of the Nitty Gritty Dirt Band?
The Nitty Gritty Dirt Band was founded around 1966 in Long Beach, California, United States, by singer-guitarist Jeff Hanna and singer-songwriter guitarist Bruce Kunkel.
What was the genre or style of music the Nitty Gritty Dirt Band chose to play?
The Nitty Gritty Dirt Band started as a jug band and adopted the burgeoning southern California folk rock musical style.
What album did the Nitty Gritty Dirt Brand release during the beginning years?
Nitty Gritty Dirt Band is the first album by the Nitty Gritty Dirt Band released in 1967.
Were there any significant performances by the Nitty Gritty Dirt Band during the beginning years?
The Nitty Gritty Dirt Band performed on The Tonight Show Starring Johnny Carson, as well as concerts with such disparate artists as Jack Benny and The Doors.

Question: DId they experience any other significant changes in the band during this period?
Self-contained rewrite: Did the Nitty Gritty Dirt Band experience any other significant changes to the band during the beginning years?