hey guys, just purchased an sc10 couple weeks ago from a forum member. i have several fifth scale gassers but all the electric stuff is new to me. couple of dumb questions. it has a tekin rx8 and a traxxas velinion motor. running 4200 2s lipo battery. should i upgrade the motor? how much run time will i add if i get a bigger lipo battery. if i do change the motor what do i have to do to the esc? thnx in advance and sorry if these questions are stupid. im trying to learn.