I just got my tsunami EPX this week and been having lots of fun with it. Im looking to make it faster, but Im worried about shorter run times. I was thinking about doing a 15t motor or getting the brushless upgrade. What kind of runtimes are you guys getting on dirt with your brushless on the stock 1800mah battery? I also have the 3000mah battery from them and will be picking up a couple of GP3300 batteries soon. TIA