BE90 - 20m circle in canter at C,E
When you do your circles at A or C make sure you go into the corner before you start the circle.
This is so there is a clear difference between it being a corner line rather than a circle line.
This is demonstrated well on the video. This also gives you a chance to rebalance your horse before you start the circle.
At A and C circles make sure you go over X. at E and B circles make sure you touch the outside track on the opposite side to where you started.
Again use cones on the 4 points of a circle to practice your shape.