I mark the 3rd point. I measure 22.5cm from the left with the ruler.
Medium
Mark the 3rd point for the 3rd spoon with the pencil. Measure 22.5cm from the left edge with the steel ruler. The distance to the bottom edge is 5cm.
Heavy
In this step, the centre point is determined, which also indicates where the middle spoon will be attached later. The centre point is 22.5 cm from the left-hand side and 5 cm from the bottom edge.