For the first 50, your lines are clean overall, with only light wobbling present throughout the set. Your convergences also show good accuracy, though I did see some lines pair off and converge towards two vanishing points, like in box 4, box 24, and box 46.

For the next 50, your lines show improvement. While some wobbling is still present, most instances are less dramatic overall. Your convergences also show improvement in accuracy, though there are a few more instances of lines pairing off, like in box 53, box 74, and box 87.

For the last 150, your lines continue to improve, with wobbling notably reduced by the end. Since it was present throughout the challenge, I do recommend reviewing the information in this section. However, your improvement shows that your technique is coming along well.

Your convergences also continue to improve, though there are still instances of lines pairing off, like in box 108, box 176, and box 248. In these boxes, the inner lines (green and orange in this diagram) diverge instead of converging at the vanishing point. Keeping in mind the angles of neighboring lines can help when planning the box's construction.

As an aside, some of your boxes are missing some line extensions, including: box 67, box 118, box 181, and box 230. Also, some of your boxes have some lines extended in the wrong direction: box 58, box 71, box 80, and box 92. Be sure to double-check that all lines are extended correctly going forward.

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