Has anyone changed their serpentine belt on their Mazdaspeed 6? It seems like the best way to get to the tensioner is from the bottom on the car. I'm looking at changing it because my car has 84,000 miles on it. THe belt looks good still....no cracks or drying. Is the serpentine belt diagrahm on the Speed6 the same as on the reg 2.3 4cyl? Thank you.