If Only

 While looking at videos of flying techniques and camera tips, I came across this accoutrement for DJI Mini 2 drones.

A float system for landing on water.

The occasions when you'd want to land on water are few and far between, but if I'd had these fitted when flying over that Welsh lake then I may not have lost No.1 Son's drone. The wind would have caught it and floated it to the side.

The main drawback is that the floats can become waterlogged, meaning you have difficulty taking off, or the balance becomes offset with the water load. The rotors can also suck up the water dripping from the floats and spray it all over the drone. However, as a safety device it's perfect when lake diving.