Kammala jumla mai zuwa: Šlitr yana so ya yi wasa da kuma tsarawa a cikin salon "rock" na zamani a Semafor amma Havlík bai yarda ba. A cikin 1966 Šlitr ya kori "Ferdinand Havlík Orchestra", amma a ƙarshe ya kashe kansa tare da Semafor da Suchý. Duo ya rabu da kamfani na ɗan gajeren lokaci, kuma Šlitr ya gabatar da sabon wasan kwaikwayo "Ďábel z Vinohrad" (Iblis daga Vinohrady). A halin yanzu ya nuna zane-zanensa a Wiesbaden, Dortmund, da Birnin New York. A cikin 1967 ya halarci Expo 67 a Montreal, inda ya gabatar da wasan kwaikwayon "Stars of Prague", kuma yayin zamansa a Amurka ya nuna zane-zane a Hollywood da Houston. A cikin 1968 ya sake haɗuwa da Suchý kuma bayan abubuwan da suka faru na Prague Spring ya sake yin aikinsa na farko "The Devil from Vinohrady" a matsayin amsa mai mahimmanci ga
Soviet mamayewa na Czechoslovakia. Šlitr da Suchý sun kuma sanya hannu kan maganganun adawa da kwaminisanci 2000 Kalmomin da Ludvík Vaculík ya yi. A cikin 1968, Šlitr ya bayyana a cikin fim dinsa na ƙarshe, "Zločin v šantánu" (Lamunci a cikin Night Club).