http://tinyrc.com/forums/showthread....threadid=19369
you can look here for more info on the resistor mod. its not actually modifying the existing resistor thats located on the board. you are basically adding 2 more resistors into the curcuit. you just have to open the back of the servo to get the pontimeter out and get to the wires.
with the shrink wrapping. did you keep those funny rubber tubes that were on the axles when you got the car? if so you got free shrinkwrap! youll notice that there is some play in the front wheels and with the tierod. i think theres a thread on this subject somewhere? you just slide them over the bottom part of the knuckles so they dont move around so much. i used tape to wrap the rods on the end of the tierods but some ppl have used shrink warp to get it to not rattle around so much. you might have some trouble with some of this binding so it takes a while to get it right. i like to think of it as a suspension bushing upgrade
i havent used lube at all on my gears! no problems. i think it would attract too much dirt. you could try searching around. hope you enjoy ur xmod
