By using the contour line drawing skill I have been able to get better with proportions. By carefully drawing and holding the pen down it was easier to make the lengths equal. As well as make sure everything was equally distanced, such as making sure the laces were correctly spaced. It also helped me to make it seem more solid, I have a habit of sketching my drawings and not making good solid lines. But mostly I feel it just helped me to be more careful with drawing with pen and not taking the pen up helped with the lines as well.