Have a ECU which is firmware 2.37 and tune 05 pr. screen. Can it update it with EZ updater 03 which i can download from Fast homepage? Think my tune 05 is newer but can i do any harm if i update / overwrite with updater 03? Reason: system is unstable, se my other post in forum. Edit: Tune 05 is maybe not the same as update 03, has anyone update with 03 and if yes which tune do you have?