It’s not hard for him to bring in someone with special effects expertise. While I agree that Michael Moore is pretty predictable, he could just be the front man in all of this with someone behind the scenes pulling the strings.
Pulling the strings?
I think he has plenty of footage left over from his Fahrenheit 11/9 bomb that he could go through to look for Sayoc.
A trick to make people finally watch part of his movie...
And friends in news organizations that may have provided additional footage although they'd rather have the exclusive themselves.
But the only string pulls he's involved with is cheese.