I just wanted to let you know that I am a SW rider and
have a 14.2H mustang that I do endurance with. We have only done a few rides,
but he is coming along nicely. We recently did our first multiday ride, and he
was actually stronger on the second day. I do not know of any mustangs that have
won Tevis, but look up Robin Hood (I believe his name is)... he is just awesome!
Good luck!