So this "self cal" thing that i have read about on the X50's, is it common? I just bought one last week and now i'm paranoid and wondering if i should take it back! It hasn't flashed that yet but...Mine is going to be used every day and it is hardwired into the ignition to come on every time i start the car. Do the X50's have a short life? I have had literally dozens of radar detectors (mostly bel) but i thought i would buy one of the best, now i'm worried.