hey im getting a shockwave as my first nitro (sorta) but i have heard about the lifetime engine swap program where they send you a new motor for half price when the old one wears out? how exactly does this concept work? also, this is kinda off topic for the question being asked, but i have Maxy's pro racing fuel and when that runs out, is it okay to buy a gallon of nitro from a different company like o'donnell racing? like what i mean is different brands of nitro. (and yes i know that the shockwave uses 20% nitro lol.)