in 1984, the band was joined by the guitarist vlada negovanović (a former butik, doktor spira i ljudska bića, and slađana milošević's backing band ljudi member). this lineup recorded the album "elektirčna iluzija" ("electric illusion"), produced by đorđe petrović and released in 1984 through pgp-rtb. in 1987, the band released the album "do poslednje kapi..." ("till the last drop..."), produced by the band themselves and bata kostić, through pgp-rtb. the album featured a serbian language cover of willie dixon's song "little red rooster", entitled "crveni petao" ("red rooster"). the album featured kostić (on guitar) and ninković's former bandmate from s vremena na vreme, asim sarvan (on vocals) as guest musicians. in may 1985, ninković participated in yu rock misija, the yugolsav contribution to live aid, and on june 15, tunel, alongside 23 other acts, performed on red star stadium, on the concert which was a part of yu rock misija.