I read an interview with Ralph Hutter a while back and it seems as he'd regarded Florian as dead ten years or so ago....
Florian simply stopped going to the studio as he was tired of Ralph's insanities......so Ralph removed Florian from the credits on later re-releases, taking the line that he never existed.
He'd earlier removed all credits for Wolfgang Flur and Karl Bartos and denied they were ever part of the band. I can imagine the lawyers are rubbing their hands in glee
I have a slightly morbid fascination with reading stories about how band members fight with each other. All the greats have done it. Beatles, Who, Eagles, Fleetwood Mac, Pistols, Pink Floyd and so on.
All the usual pressures of course, from money, drugs, women, wanting 'creative control' and so on. And sometimes they make up. Hell Froze Over for the Eagles. And Pink Floyd reunited with Mr Waters for the 2008 Live 8 gig, which was entirely epic.
But anyway.... Kraftwerk. Love them. Always have done. Saw them in London twice on their Computer Love tour in 1981. Not even sure they were actually personally on stage throughout, as I think they had some models or mannequins or something. Of course, that only added to the intrigue.