Actually, the law is that the spotter HAS to be stood next to you, and you most certainly cannot have them "daisy chained", so no matter how much shouting you did, its against the law
The law states: “The remote pilot may be assisted by a UA observer helping them to keep the unmanned aircraft away from other aircraft and obstacles. The UA observer must be situated alongside the remote pilot and observers must not use aided vision (e.g. binoculars).
Aside from that, i am happy for you that you are happy with that distance, I for one most certainly wouldnt be and lets be honest here, i don't use a "spotter" i just send it once, maybe twice and that's it, no need to do it again.
I sent the Mini 2 in CE to 3.49km (no proof of that flight, must have deleted it), I then sent it in FCC to 5.5km at a height of 17m for the most part then ascended to 27m towards the mid point, I turned with still a full signal as seen in the image below, it was the battery being at 65% i thought it best to head back, i landed with about 11 or 12%, all under thick fog i might add. I would expect the new model to at least match that in both modes, if not then i would be sorely disappointed for that money!
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