I just ran my Raze Buggy with a MMM, 36-060-2000 medusa and 2 x 4S 2650mAh 30C Flightmax packs with good results. Ran for 10-15min of speed runs and easy bashing (no jumps). The batteries started with 4.15v/cell and ended with 3.82v/cell on all 8 cells. Temp at end of run was 80-82f on the packs, 115f on the motor and ~80f on the MMM. The byggy is geared 46t spur and 15t pinion.