The band collaborated with Manco in 1967 and released a four-song EP that contained the later Manco hits Kol Dugmeleri and Seher Vakti. Most of the later Kaygisizlar releases resembled the initial one -- the records were equally weighted combinations of English-sung rock & roll songs and Turkish-sung folk songs or Manco compositions, mostly in a rock & roll form but with many more innovative touches here and there. Considering the chaos of the Turkish music industry in those days, it's next to impossible to name the musicians who played on any given single, or even name the bands playing on some of the songs, as many different versions, retakes, and even pirate copies of Manco songs have been published. Some Manco releases don't even have the name of Kaygisizlar on their covers, although the members were credited.
In their brief journey, Kaygisizlar and Baris Manco evolved from straightforward rock & roll to a more Anadolu-driven psychedelia-touched music, but it might be concluded that the bandmembers parted ways before reaching a peak. They released Trip (To a Fair), the haunting instrumental Bogazici, Kirpiklerin Ok Ok Eyle, The Flowers of Love, and Ay Osman, which were all important influences for the next step in the Turkish music scene. Kaygisizlar released Sasirdim/Son Gece and Artik Yeter/Huzun without Manco, but Güner and Alanson soon departed as well, inaugurating their new project, Mazhar-Füat, which later became MFÖ. ~ Vefik Karaege, Rovi