I think the catchweight depends on one thing. Whoever wants the other fighter more has to make the weight gain or loss. Is it more important to Mosley for him to be the one to stop the Pacquiao train to add to his legacy? Is it important enough that he must take the risk of taxing his body as much as he has in years? Or is it more important to Pacquiao to add a 7th division title to his status? Important enough to go back to 147 (a weight not natural to him) to face a natural welterweight and give up a big weight advantage and risk having his train stopped? And then theres the catchweight. Meeting in the middle to try to even the odds, but more than likely it would hurt Mosley more than Pacquiao. I guess it all depends on whose got more to proove, who thinks they need it more. That will determine the weight at which this fight is fought!