Petersson brings to the writing of music and was the very first bassist to play a 12 string bass guitar. Jol Dantzig of Hamer Guitars was the contractor of the first 12 string bass guitar, an 8-string bass in theory but with four classes of three strings. The origin tuning of every class corresponds to that of a four-string bass and adds two strings tuned in unison one octave over the origin string. Initially Hamer assembled him a 10-string bass, then the 12 string he initially desired. His 12 string bass guitar introductions on the tune “Heaven Tonight”. Petersson plays bass guitar as another lead guitar on “He Is a Whore” from Cheap Trick’s debut record. Petersson left Cheap Trick, soon following the record of All Shook Up, on August 26, 1980. He moved to Nyc and played shows together with his group called Sick Man of Europe, that was the name of a pre-Cheap Trick group he was in with Rick Nielsen. Petersson rejoined Cheap Trick in 1988 for their Lap of Luxury record. Despite going platinum and including the #1 hit song “The Flame”, Petersson attributed Lap of Luxury for pigeonholing them in a sound they are not comfortable with, which led to Busted as well as the conclusion of the relationship with Epic.