Opinions please?

[squeeforever]

Ok guys, as some of you know, I am in the slow process of rebuilding my E-Revo. V3.0 will have the batteries on the right side with the motor on the left, were the stock nitro motor went. It will use a Revo 3.3 tranny with a center diff and rear brake kit so I can tune the brake bias as well as not be so hard on the speedo and keep the 2 speed. What I can't figure out is the battery situation...Its either 4S or 5S with a Mamba Max esc and a Neu 1512 or 1515. 1512 only because of weight, etc. because this is gonna be a all out racer. What are your opinions? I am not really concerned with running the MM on 5S by the way....