So I ordered the Argtek mod with 10dbi antenna last month. It arrived last week. I wanted to conduct pure range test (no wifi, cell tower interference) so I packed up my P3S and flew to Mexico City. Found an empty field with at least 10km of empty space. I performed the first test with the stock antenna and reached 1.325km before losing signal. Installed the mod and performed the test again, at the same location. Signal dropped at 600m. I checked the connections twice over and everything is good (connected properly, connector not dirty). As a last ditch attempt, I re-paired the controller. Didn't change anything. All 3 antennas do not look defective (the connectors anyway. Is this thing really this bad? This was a test to see what the Argtek mod can do. I'm sure other mods are better but I conducted this test specifically to see what distance the Argtek mod can achieve under perfect conditions.