I searched for this but didn't find anything. But anyway, do people share the "xtr" files from the sct xcalbrator II? The reason I ask is, I have an xcalII and I want to change the gear ratio and wheel/tire size to fix the speedometer/odometer, and I dont have an appointment for a dyno tune for 3 weeks yet. I saw I can do this in sct's extreme tune program, but I don't have an "xtr" file to edit. If anybody can help out, I'd appreciate it. If it's not even worth it, then I will just wait the 3 weeks, but in the mean time, I'm putting dummy miles on the car...well let me know. Thanks!