Hi, I just bought an older E maxx, the one with the 27 MHz transmitter and the purple evx esc. I am not sure if this esc can use 2 lipos or not. If it does, where can i find a cheap lipo detection charm? Also I want to know if there are any inexpensive brushless motors/esc drop-ins that I could put in it. I would like a motor that is waterproof but I don't want it to be super slow... Maybe 30mph on high gear and I want the esc to take at least two 2cell lipos. Please help, I'm not very experienced with electric rc(I'm used to nitro) and I don't know many motor brands that are good.