In the beginning, I thought you were repeating the same boxes over and over again. But later I had broken this scheme, which I really appreciate.

One thing that I want to mention is line weight. At boxes 90-123 and 191-234 you added line weight to the plane that is facing the viewer, which is incorrect. As we use x-ray vision, you should add line weight to edges that you would be able to see in 3-d space.

As in boxes 139, 140 you sometimes don’t know in which direction you should extend your lines. Think you it where your lines converge, where they’ll meet. I think in 140 box you should add hatching at the bottom plane and it would solve the problem.

Those are the only little mistakes that I’ve noticed. You’ve done great work and progressed through this challenge.