To add my experience/more noise to the channel, I installed a NanoSync and range is ****. I was another of the unfortunate ones that received two of the same short antenna cables, and worse, I think I did damage to the left antenna/side trying to get it to work. After taking it out the first time, with the smaller antenna, few hundred feet out and the radio signal would drop completely. The right antenna/video signal was strong with no bars dropped.
I reached out to MAXX support and they said they now send only "long" antenna cables and this was mistake. They sent me a replacement antenna kit, and after taking the controller apart - again - and putting the long antenna cable for the left it seemed to help, slightly, was able to get out max 1500ft before the radio signal dropped completely.
I will say support is great (Jake @Maxx UAV). He even sent me a replacement Nano to see if that would fix the problem, and sadly got the same results. It's the suck. I'm going to try some boosters that I had and see if it will help. Otherwise, my advice to others would be to stick with stock.
-Kevin