Hitting circle edge for Centres and Wing Attacks is a skill. There are two different kinds of landing on circle edge. The double landing and then the cushion landing.
Double landing involves two feet hitting circle edge simultaneously. Cushion landing is one foot then the other.
My preference is to coach the later as it’s kinder on knees.
Feeding the ball into Shooters flush on the circle edge means no hands over the ball. When you practise this you’ll be amazed how players don’t get circle edge and feed from a distance. Another one percenter!