In 1991 he joined Toto on their Summer Festival Tour .
Though no longer a member of the band , Dias continued to work with them as a session guitarist , appearing on 1975 's Katy Lied , 1976 's The Royal Scam , and 1977 's Aja .
In 1991 Dias joined Toto on their Summer Festival Tour .
Though no longer a member of the band , Dias continued to work with them as a session guitarist , appearing on 1975 's Katy Lied , 1976 's The Royal Scam , and 1977 's Aja .