Tell your raid leaders that Blizzard MT sucks. It's only limited to 2 MTs(?), doesn't display them in order(?) and whatever other stuff I've heard. (Note, I don't use em, I'm just trying to remember what I've heard :P )
It's just a display. It doesn't handle any of the data communication between the mods. PitBull is not X-Perl. X-Perl is a unit frame mod that *also* handles CTRA, etc. compatablility, and deals with more than just MT frames. PitBull is just unit frames. It allows you to view the MT list in PitBull frames (so that they match the rest of your UI). That's all.