Perspective Drawing

At the start of the perspective drawing I felt getting the initial lines in proportion would be slightly difficult with the vanishing point, however after seeing how the vanishing point works with the rest of the construction lines I found the perspective drawing fairly easy. One of my down falls for this piece was not using a ruler and I felt it made my drawing feel more like a rough sketch rather then a detailed drawing, Although I am happy with the result and feel I have improved in learning how perspective drawing is done.

Here is my perspective drawing: