06 assignment Orthographic Projection

Here is another reason for cancer : Drawing tape dispenser using orthographic projection. I hear that you asking whether is that a prank or not. If you are architecure student, you should get used to this kind of unbelieveable assignment and of course there is no way for prank in architecture studio. Whatever, in this drawing, real proportion was used by me and as you know, sometimes something happened without your control. There are some notes in my drawing which reveals my mistakes and after critics i learn how can I draw with ortographic style. In addition, if you want to learn what ortographic projection means, here comes :

orthographic projection (n)  projection of a single view of an object (as a view of the front) onto a drawing surface in which the lines of projection are perpendicular to the drawing surface 

And here is my model (tape dispenser) and my drawing :