servo, horn, linkage (various types) idler arm (if equipped) throttle (slide or barrel), throttle return spring (if equipped) and then the brake linkage. some servos use single horn, (throttle and brake connected on same side of servo center) or dual which has brake connected typically opposite or 90deg to throttle horn. I have seen a lot of the same parts called many things so if I expect someone will correct something here, don't sweat it. I don't
Set up. Start with throttle linkage with xmtr trim centered and air filter off. Adjust linkage so that when throttle on xmtr is wide open, the throttle is wide open and not trying to push past full open. when released servo should return to center with slight play before engaging throttle linkage again and throttle should be seated on idle set. you then adjust your brake to your throttle setting so you have no drag while neutral but full brake potential when applied. That is just one technique, if it's not what you were looking for, let us know.