Dave can reach every note even with his original voice. I'll bet Dave's voice is in much better shape than Jon's and it is just a matter of time when Dave replaces Jon and begins his career as a lead singer of BJ.
Then Richie changes his instrument from guitar to piano cause his fingers are so chubby he can't tab them anymore...
Tico is fired from the band because he continuously keep coming to stage naked and he gets the audience go too wild...
Jon has then 2 places to go; behind the drums of guitar... He obviously takes Richie's guitar cause he remembers how auedience went wild in Manchester when he played the solo of I'd Die For You (though the audience cheered for Richie's unbelievable big belly)...
Then Hugh conquers the drums cause who is he kidding; it has always been playback...

But yes... you might be right about the Dave's mic...