First I am a rc amateur. I have slash 4x4, i have upgraded the a arms, hub carriers, got new tires for dirt
racing. I got the king headz motor mount. losi 2.5 spring with the traxxas big bore shocks. Is the any other must do upgrades I should do? Also the real amateur question, what is the servo and what does it do?
Whats the point in upgrading it? Thanks.