was watching a youtube vid of mo's, he uses the Pegasus which I recently switched over to. They're a bit heavier but I think it's worth it for the dirability and perfectly neutral ride. In the vid he shows how Nike custom built his to have a loghter, more elastic heel cup, similar to that of a Free Run shoe. They should really make this an option for the public. Is there any way to take some weight out of the heel cup on my own?