so far my atomic center dif is doing just fine. it needs to be full tight but it is working.

I have 2 problems.
1) the steel drive cups I got are cutting the dog bones. maybe 15 minutes of use and the drive pins are 1/2 warn

2) my atomic spindles seem to have the bearing spacing just a touch too far apart. If I tighten up the wheel nut the bearing binds. only on one side. there is no room to put the kyosho FAQ spacer in either. that makes it worse.
I know the bearings are fully seated in the hub too.