Can anyone using Wistler tell me if I can switch off K, Ka and Laser on a model? Only X-band is used on my way to work. I saw some programmable feature on 1793 which claims it is possible, but not clearly advertised or stated by Whistler. I've had $300 Beltronics which gave SELFCAL error message so I'm not willing to spend big bucks again for non reliable Bel's units for fairly the same performance. May be even Whistler is better on x-band detection..?