I’ve had quite a bit of experience using a casting net. I agree they take a lot of practice to get them to open out into a perfect circle when cast. I seem to go through phases when I use it a fair bit followed by periods of inactivity. When I haven’t used it for a few months I sort of forget the action and almost have to learn how to cast it all over again. I once caught 14 yelloweyed mullet in a single cast! They sure work well if you toss a bit of berley on the water to bring the fish around.