yep thats it, Blink, Havok and Forge use two skeletons, plus Forge has moveset flying. So the game has two load the 3 extra fightstyles, plus the moveset. Quicksilver wouldnt cause any problems since he only uses one. (thats one of the reasons why i moved xman to only one skeleton, so the game wouldnt struggle to load the new fightstyle and his moveset. also it depends how complete the fightstyle is, for example Stepford Cucook, Multiple Man, Avalanche and Marrow all work find together since they have only the basic attacks, but Beast, Havok, Cable and Emma Frost would cause issues since their fightstyles are complete)