When Fast Eddie left, the official reason was that he was upset was that playing a song with Wendy O Williams would make people think that they had turned punk. I think that was not the case though. They had already done a song with Girlschool that was almost rockabilly.
When I saw the Toronto 1982 show, it looked like they were mad at each other. Perhaps Eddie didn't like the fact that Lemmy was dating Wendy?
Was there ever a good explanation regarding why Eddie left in any of the books? I'm certain the punk excuse was just made up as Motorhead had many fans back then that were into punk.
I'd love to hear what really happened.