I have my e-revo running on a pair of 2s 4000mah 20c Venom Lipos. I have changed the pinion gears to 16 tooth. Other than that the car is stock. I am getting 30 minutes of hard running easily. Yesterday it was more like 35. I have yet to ever have my LVC kick in so I could potentially get more run time but I'm scared to push it. Is this odd?