Hi, I'm possibly looking into purchasing a Turbo XS UTEC piggback for an 02-03 WRX. I would plan on installing this in my 02 WRX but am wondering of its relevancy and reliability compared to modern tuning applications. My car currently has a K&N Typhoon CAI so to my understanding I would be able to run the stock map on the UTEC and then switch to stage 1 for the CAI and then tweak the tune to match my car? Or can I only run Turbo XS bolt ons with this ECU? Also, starting as a noob when it comes to tuning, would it be safe to try to tweak the stage 1 tune in the UTEC after I have done thourough research on tuning it as well as asking for advice? It's for sale locally for 100 bucks and am just curious of the viability of running this ecu in my car.