People are so mean to them, lol. I personally love them both~. Except I have problems when Peco shows up wearing something, um, revealing. That can be devastating.
On topic; I think it's a big juicy 'Yep.' to say that they back on some (probably few, though) songs. Like the rest of the band. I'd assume it'd depend on whether they're available or not and a bunch of other variables.
