it seems lately that i only have front brakes working. e-brake works perfect . i just did all 4 brakes 3k miles ago and everything was normal. i do got to the track often and maybe i have worn the rear out from power braking. but not tis quick,i dont do it that often.when i stop at a light is grabs firm under 10 mph and is very sensitive when braking under 10 mph. if my rears need to be done again then i guess im buying a line lock setup. is a line lock kit fairly easy to install? any recomendations on a good pre made kit that is readliy available?pros vs cons?