You can also do the engine replacement program that HPI has. Can return any engine and get another G3.0 for 65 bucks. Im thinking about going that route. was thinking about getting the 18 cv-rx but its like 150 bucks. I dont know which one is the one i need, i know its the one with a rotary carb but unsure about which crank. I got one in my tmaxx and it runs great. i bought it when it was 100 bucks on tower.