The Busic Brothers definitely invite Eduardo Ardanuy, who had previously played in bands such as Anjos da Noite and Chave do Sol. They become the backing band of vocalist Supla (ex-Tokyo). After a few shows, the trio decided it was time to invest in their own career. Already by the name of Dr. Sin, they travel to the United States to distribute and publicize their work, scheduling even some presentations. The band's first concert was on January 11, 1992 at the Black Jack in Sao Paulo. In February and March they do 3 shows in New York in the USA, in May open for Ian Gillan (Deep Purple) in Sao Paulo.