The last plane I crashed was more than twenty years ago, in fact I did not crash but its wing disintegrated in the air when I was doing extreme maneuvers with a Calypso gas plane, ws 60" or more and that was a sight.
My favourite 2m pattern plane
I tend to keep at least 60 feet above the TOWERS - since the lines are lower and if I just fly over the lines, it's easy to forget the towers are higher and accidents might happen. So far, no transmission issues with my Mavic 3E, Mini 4 Pro or...
There are 2 versions of the Dongle 2 as well - one for the Chinese mainland and one for the rest of the world where connecting to and using the 4G network is allowed.