Referencing the mamba maxx:
It isn't rated for 4s, and I want to stay within manufacturer recommendations, additionally I am not going to wait for the MMM which was due out 2 years ago initially.

Referencing the connectors:
I will be changing to deans, I just haven't yet.

Referencing the buggy weight in Nitro form:
I don't know, I bought it as a roller but kyosho advertises it as 7.5lb, I do not know if that is with or without fuel.

Edit:
As for the century pinion: I don't know yet, I haven't had this thing running yet, between the cold/snowy weather, and the lack of good batteries, I have yet to turn it on.
Thanks for the input