Did you try and switch? I'm hooked to the back button. I was walking the dogs today and had the cam with me. By using the back button I could easily shoot single-handed while still holding the dogs with the other. When pressing, you automatically tighten your grip. I also fully switched to group focus to track. It's a slightly bigger area than the single point which improves staying on target but it isn't that big the focus jumps to something else.
It makes capturing flight so much easier.
No not had the weather to try any thing lately