agree ......... not for racing , not for high fly jump ............. it is a monster . real one for crash the car .......... hehe i have one . original want change to Crawler ........ but ....... need chage many metal parts ....... $$$$ so .............. forget it. and i may lock the " gear box . " for slow clamb . my friend suggest don;t do it . CB frame too heavy it will damaged my CB .