This should be a big day for Radiohead and Kraftwek fans, but it's a bit bittersweet. Here's why:

Radiohead has drafted legendary German electronica act Kraftwerk to support its spring tour of Latin America, which begins March 15-16 in Mexico City. Kraftwerk will also play headlining shows April 25-26 in Wolfsburg, Germany.

However, the group's lineup appears to be in flux. Founding member Florian Schneider, who did not appear onstage with Kraftwerk during its 2008 world tour, has left the group, according to Kraftwerk's official fan Web site.

Lone remaining original member Ralf Hutter told the New Zealand Herald in September that Schneider has spent the last few years "working on other projects; technical things."

To be honest, will anyone even notice that Florian is no longer in the band?

DOWNLOAD: Kraftwerk - "Trans Europe Express"