Yo, TA qzhans here!

Before we begin, I just want to congratulate you on giving those 250 boxes a good ol’ pen and ink smackdown. It is a MASSIVE undertaking and you’ve joined the prestiged club of its completers.

You’ve painstakingly drawn through all your boxes and extended every single last line out to check your errors, and your boxes have been better for it. Indeed, you’ve made a marked improvement throughout the set, with some of the boxes on that final page reaching laser cut precision.

I also like how you've used line weight to reinforce the silhouettes of your boxes and help them pop out. I'm not seeing too many places where that got wobbly or anything either.

Additionally, You've done a nice variety of boxes here, from big to small. I do think, in the future, that you could challenge yourself with super long or super flat ones, however.

Also, although you've done a pretty good job with convergences, some of your middle back lines are still stubbornly not jumping in line with the rest of them. That’s okay, and is something that gets ironed out over time, but I’ll offer some advice. When you go to draw a line, think only about the lines that are supposed to be parallel to it (share a vanishing point). Lines closer to an existing line will converge slower, while the opposite is true for lines further away.

And one final nitpick: don't be afraid to extend your error lines twice as far as you're doing now, crashing them into other boxes as need be.

Overall, this is a strong submission, and there's not a lot of stuff I can pick on. If you're at this level, you might consider looking into the advanced exercises rather than pulling these out for warm-ups again. I'm excited to see you take these skills in to the rest of Drawabox!