Need help with choice of 1/8 scale diff for E-maxx

[Maxxamongus]

These three R. C. builds are yet the most time which was spent for their existence beyond the two other R. C.'s I'm privileged to have. I didn't know the aluminum parts greatly advanced this fun hobby over the years until various parts no longer existed for them. Much fun hobby still. That's the reason why I do enjoy posting pics as well!