so before adding tons of options, consider buying a good servo
prices in HK are unbeatable for servos, take a look on the Futaba or Ko Propo servos, they cost 60-90$ in HK, u will really notice a difference (more than adding red things)
a better radio system (FM/model memory/different setting) is interesting too
I own a Sanwa MX3, pretty cheap and has a lot of cool things like 5 models memory, 3 channel
futaba :9550 ($80)
Ko : 2125, 2143 ($90)
KO EX1-R $185 (w/o wervo)
which batts, charger, motor and speedo do you own
it is better to spend more on stuff u can keep for a long time than buying cheap or useless things that u will change everyyear anyway .
hope this helps
I wish i will come back visit HK one day , have been there 3 years ago for a trip.....didn't have time to buy things for R/C
I used to come every year to Taiwan to see my friends and learn Mandarin .
but they don't like too much electric R/c there, they just have huge nitro tracks....