Steely Dan was big into special studio recording guests.
Fagen/Becker was infamous for have A-list musicians record a song...and the next day another set of A-list musicians would record the song again.
Then there was countless mixing sessions...almost “paralysis from analysis”.
Fun facts...
When they were in LA recording “Gaucho” album, their asst engineer, Elliot L. Scheiner, went on a date with a MUCH younger local girl who he discovered he had absolutely nothing in common. That experience became the basis for the song, “Hey Nineteen”.
Later, Elliot became the lead engineer in designing Acura’s “ELS” sound system.