I consider myself a noob when it comes to this stuff, especially to expert mode. I've only had my X50 a few months and I decided to try expert mode this week. I've noticed that most of the time I get an X-band alert, I also get about 1 tick worth of K-band most of the time. It happens so consistently that I'm convinced that the X-band sensors at stores are triggering both. Does this sound like a calibration problem or what?
Also, last night I was looking through programming options again. What's the disadvantage to using Fast start mode?