I have upgraded brushed slash to brushless and it was great for first 5 minutes then throttle disappeared, esc started blinking fast red light.. called traxxas was told overheated/burned although used only one stock battery. So, they send me fresh set up. I put it in and nothing happens except blinking fast red light. Although I am able to program esc, turn LVA on/off. Using fully charged Ni and Li batteries makes no difference. Traxxas told me to check voltage o batteries as they think fast blinking red indicates over voltage. What do you guys think? I am new to this hobby and have no clue. Oh, I was running Ni battery underwater few times..