After the Japanese tour at the beginning of 1991, Gamma Ray underwent another personnel change: the rhythm section (Wessel and Kusch) left due to a personal disagreement and were replaced by Jan Rubach (bass) and Thomas Nack (drums), both from the Hamburg band Anesthesia. The band also began to build their own studio, so work on their new album did not start until 1993. The album Insanity and Genius was released in June 1993, with a style which was closer to that of Heading for Tomorrow than Sigh No More . In September 1993, Gamma Ray, along with Rage , Helicon and Conception , embarked on the Melodic Metal Strikes Back tour. The tour contributed to the release of the double CD Power of Metal , and the videos Power of Metal and Lust for Live , in December.
After the Japanese tour at the beginning of 1991, Gamma Ray underwent
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