Originally Posted by nbTMM

It's worth building it with a full ball bearing set (tamiya part #54476 or a set from the multitude of 3rd party vendors) because the standard kit comes with plastic bushings which wear out quickly.

Oil filled shocks (tamiya part #54753) might also be worth getting which will make the suspension less bouncy, especially useful if you plan on driving it over a rough ground. They will also handle more dust and dirt than the standard friction shocks before they need to be rebuilt/cleaned.