Is this Amherst PD? My R8 has saved me several times in this area already. The one thing I haven't tweaked yet though is the K band detection - it detects K band with a much shorter distance so you have to be careful. I thought Amherst was going all Ka band when they started replacing their Chargers with Durangos but I just encountered a Durango this week with K... guess they reused some of their old radar units :(