Wait on the lipo until the BRCA list is out, your main advantage will be gained using the right tires, indoors on carpet yellow mini pin, outside on grass/astro try yellow mini spike, do not use these tires to run up & down the street, you will scrub the pins/spikes off them. Nellybobs will be able to tell you what tires to run. Nice car the ZX5, may not be the fastest chassis ect, but solid and good to drive. have fun
