sorry lastly on PID's. i'm not amaammamazingly savy when it comes to engineering etc but i've been encouraged to but a PID in the silvia in the past it's meant to be pretty easy and there are tons and tons of internet walk throughs. can easily find you a couple of people to talk to if you were to get stuck. i'll dig up some youtube vids of people that have done is bizarre shit with their silvias
sorry lastly on PID's. i'm not amaammamazingly savy when it comes to engineering etc but i've been encouraged to but a PID in the silvia in the past it's meant to be pretty easy and there are tons and tons of internet walk throughs. can easily find you a couple of people to talk to if you were to get stuck. i'll dig up some youtube vids of people that have done is bizarre shit with their silvias