Conversation so far:
What is the name of a project that David Marks worked on in David Marks's Post-Beach Boys career?
The Moon, along with Matt Moore, Larry Brown, and David Jackson.
What year did he release The Moon?
1960s psychedelic.
How do the public respond to the album?
two under-promoted albums on the Imperial label.
What is the name of a song from the album?
Ultimate Collector's Edition.
Did he find success in his postt-beach boys career?
years old, he had been signed to five label deals and had grown disillusioned with the Los Angeles music scene.

Question: What made Marks leave the Beach Boys?
Self-contained rewrite: What made David Marks leave the band the Beach Boys?