Hi... I'm Rick and I'm new to the stagea forums... I have a a m35 arx and.am about to start modifying it... As for ecu options I have read all the covered options and decided to do some searching of my own... The only other option I found other then what has been covered is something called UP REV OSIRIS TUNER... I believe rev zone are the dealers in melbourne for this. I have spoken to them and they want to see my car and plug in a diagnostic to see if they can licence the ecu... Anyone been down this path???