There are certain bands that can't have any of their members replaced.
the Beatles,the Rolling Stones,Led Zeppelin and Aerosmith is def one of them. I love Sammy in fact I went to see his creation Chickenfoot (who rocked) but Sammy just would not fit in the Aerosmith family. He was great when he was with Van Halen but then Gary Cerone closed down the Van Halen camp for quite a while. I've seen Aerosmith countless times and I couldn't imagine anybody else up there singing but Tyler.
keep those model subway trains running - watch the closing doors