For the first 50, your lines are clean overall. However, I did see some wobbling throughout the set. Your convergences also show good accuracy, though I did see some lines veer off in the wrong direction, like in box 2, box 22, and box 45.

For the next 50, your lines show improvement. While wobbling is still present, most instances are less dramatic overall. Your convergences also show improvement in accuracy, with fewer errant lines. However, I noticed some lines pair off and converge towards two vanishing points, like in box 53, box 71, and box 91.

For the last 150, your lines continue to improve, with wobbling further reduced by the end. However, since it was present throughout the challenge, I do recommend reviewing the information in this section to ensure that you're practicing the proper technique. Your convergences also continue to improve, though there are still instances of lines pairing off, like in box 110, box 170, and box 215. However, this also became less frequent by the end, so I don't think it's a significant concern.

As an aside, box 41 and box 57 are missing some line extensions. Box 100 and box 171 also have some lines extended in the wrong direction. It's not a major issue since it didn't happen often, but I want to point it out for future reference.

Some of your boxes get a bit small towards the end, like box 124, box 169, and box 215. Drawing larger boxes is more effective for practice, as it'll help you engage your whole arm from the shoulder, and will engage more of the part of your brain that processes spatial reasoning.

All said, I'm going to mark this challenge as complete.