I have a P3S. I installed the ARGtec antenna extender about a week ago. I am trying it out at the beach. With open unobstructed view, flat terrain I can only get about 900' without losing signal and going into rth. I reseated the plug for the antenna and still terrible range. I got almost 2000' with my stock antenna. Any input would be appreciated. I have a afterthought....... I am flying about 25 feet from a wifi router in a window...hummmm...could this be the problem? I was expecting at least a mile.