I am lucky enough to put my hand on so many good car (S710, MTX-3, G4 pro, NTC3, FW-05R, R40....) for free
I can tell what those problem all these car have.
most of them, except S710, need many upgrade to be TQ unless you spend more on those "factory kit"
for most other car, upgrade is neccesary.
unlike S710, most upgrade is unneccesary, why spend money on it .
serpent's car require racer to understand the car instead of rely on the car itself. with other people's help, s710 will help newbie to master nitro car in shortest time and least amount of money.
good job Serpent