Anyone else have issues with their dynamite gps being off? Been using mine for about a month and today I thought I would go out in my car and compare it to my speedometer in my car. Also compared it to a speedometer app on my phone. At 55 mph car and phone read 55. Dynamite read 53 mph. At 65 mph, car and phone said 65 but dynamite said 62. For 90+ dollars I expected better. And who knows how far it's off at speeds over 100 mph. Next time rcjuice has a sale I think I'm getting the 2nd gen skyrc gps that just recently came out.