on and off road fun,brother has a hpi evo and i love showing him most weekend how much better a hyper 7 is, i ave a boost bottle on at mo that come with car , does anyone know if these work? , also would love to hear in anyone near me dudley halesowen, blackheath , knows any decent off road and on road places to take our cars theres 4 of us, me with hyper 7, my borther with evo rush, a mate with a virus and another car which is so crap it has no name ,