UNDATED (AP) — Peter Cetera seems to be open to the idea of performing with Chicago at their Rock and Roll Hall of Fame induction after all. Cetera posted an open letter on his website to the other members of the band. He suggests they could all walk onstage together one last time as a group, and he’ll strap on the bass for “25 Or 6 To 4.” Cetera says it would a fantastic moment and “satisfy those who have always wanted some sort of a reunion.” He also suggests Chicago’s past and current members be invited to play on the song, since they’ve all contributed to Chicago’s legacy. The other band members have not yet responded. Chicago keyboardist Robert Lamm had said last week he spoke out of turn when he said Cetera would play at their induction.