I know there are a bunch of different ones out there. But I don’t want to do any modifications to the controller. Are any of the slip on ones even worth it? Or are they a gimmick? I’m not looking to go further than the 4 mile advertised range. I’m looking for a better signal. Better penetration through trees. I usually don’t even get a mile because of the trees that are around. I’ve been flying over frozen lakes and are usually get maybe a mile if I’m lucky. I was on one side of a frozen pond this morning and do across it and kept going a little bit and started music range signal at just under a mile. I’d like to get a mile or two and I would be very happy. Yes I realize I was a few feet over the 400 range in the image, but not much. I usually keep mine around 150 or 200 feet. I don’t fly over the max altitude. but I was starting to lose signal and did not want to see the drone so I brought it up to around 410 feet to get it back. Also it was not really 400 feet. The ground was higher than where I took off from.