good choice, on mine i have proline 40s with one set mashers, for the rough, and one set bowie, for the dirt , i would recomend swoping the steering servo cable in the reciver, to the battery socket, and the battery to the steering servo socket.
reason being when you put your piggy back battery in, you give the steering servo a full 6v.
this makes a hell of a diffrence. so dont wast money there, they aint so bad them servos.
get a set of sway bars, on ebay around £18,
know i use 45 shock oil, and red and gold springs on the shocks.
oh yer, check every nut bolt and screw when new.
hope this helps