ill check into it my friend has a ul1 he runs 14.4 volts, and we clock it at 44mph consistantly the guys from g-freak told me that they run thiers dual 3s in paralell like 3s 9000mah and they clock it at 50-55 so i figure if i run 4s on it it should be pretty fast... im wondering if i should go with the rest or get a custom setup type deal... thanks for all the feedback though and you guys have really good points..