Little help?

ok, so i got this new impreza(45mhz)
all is good, but i notice that my older(1 month old) back axes(the back post with the rear wheels, tinds to make a louder screetchy noise, and look tight while running.
the newer one(impreza) is nice and loose while running, and has a low humming tone. is my old bit just,,, old? i try wd-40 on them to, did one get to much? should i wash ones backing?
and im going to solder soon, the cat5 to the board, any tips>
cause im scared, what if i miss????

[hogjowlz]

other mods are more useful than the cat5 cable. and less dangerous. search for 4 aa batteries.