I was under the impression that the center diffs were the same. I just bought a replacement CD for my Kraton that apparently came out of a Typhon. The spur gear meshes but the teeth seem fatter and more dull than my original. I'm not sure how clear the difference is in the pictures. It doesn't seem like wear. The new spur doesn't get as far into the teeth of the spur. How do I set the mesh for dull teeth? Tighter than normal? Or should I just use my original spur? Is this one better in any way?