Does anyone know if there is a trick way to alter the amount by which you must exceed the speed limit to trigger the alert? I was on Interstate 5 yesterday and found that the new 8.x maps have limits for that freeway. It seemed that the alert sounded at about 64 MPH in a 60 MPH zone. I would love to be able to increase that margin just a bit. The alert is a good idea, but could get REALLY annoying.