I don't know about in camera setup but I always use a double bubble level mounted on the hot shoe of the camera to be able to get it level to pan a wide degree.
Wow, you would not think those prices would be so high
compared to a homedepot Leveler Now I dont mind spending money, but I sure like to SAVE IT more.
This item is definitely more convenient, not to mention mount to the hot shoe. I guess I am just being a stingy today