Nope, Rutger ACED, he has a very huge role in the ABBA arrangements, first of all, he's classically schooled (classical acoustic guitar, harp, and orchestra/string arranging), and second, he sight reads perfect, something that impressed benny and björn from the first day they met him.
Cool. When I first listened to ABBA long long time ago, I didn't pay attention to the bass. Now I pay close attention to the bass in ABBA songs. The bass truly drives a lot of their songs.

