So I'm tagging myself in here for Tofu. Looking through your work (and the initial submission), I do think you're improving somewhat, but there is one main issue that stands out - you still tend to have a ton of divergence. This issue speaks less to a matter of skill (like something that'll just get better with practice), and rather suggests to me that you may not be focusing your attention on the right things, or in the right areas.

Sometimes students will get hyperfocused on the back corner, because that's generally the thing that's going to be the most out of whack. As a result, the actual convergences of your sets of lines is still pretty scattered, with a ton being entirely diverging - which as noted throughout the instructions is exactly what we're trying to avoid.

So for example, if we look at 98 on the last page, two out of the three sets of lines are diverging. Being that we want our lines to converge as they move farther away from the viewer, when noticing this kind of issue when extending your lines (extending the lines makes the inconsistencies in convergences more obvious so we can identify and address the issues after all), this should be something you're actively attempting to address - but I do not believe that it is, based on what I'm seeing.

Getting back to the back corner, many students will focus on that instead of the convergences of their lines as they extend further away. The back corner becomes a red herring - it's a symptom of the issue, but not its cause. The cause is, as is stressed throughout the challenge, the convergence of your lines towards their shared vanishing points.

Thus, it is critically important that you are always thinking about how the line you're about to draw is supposed to converge in a consistent manner with its siblings, the lines with which it is meant to share a vanishing point. While there's still lots of room for smaller mistakes where the lines converge, but do so at different rates, meeting at different points, actively thinking about how your lines are meant to converge should be enough to avoid complete divergence.

As this is still a significant concern in your work, I am going to ask for 10 additional boxes. Obviously in the face of the 350 you've done thus far, that's not going to be much - but I want you to consciously think about how each and every line you're drawing is meant to converge with all of its siblings (including those you haven't yet drawn).

That said, given that I'm only having you draw 10, that each individual instance where all the lines of a given set are diverging as they move farther from the viewer is going to stand out a lot more, and will suggest that there are still major issue with how you're approaching the activity. So take your time with each box, and with each line you draw.