For the first 50, your lines are very clean overall, though there is some arcing and 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 box 8, box 29, and box 48.

For the next 50, your lines show improvement. Arcing and wobbling are less frequent, though some instances are still present thoughout the set. Your convergences also show improvement, though I did see a few more instances of lines pairing off, like box 55, box 75, and box 92's blue lines.

For the last 150, your lines continue to improve, with wobbling further reduced, especially towards the end of the set. However, some arcing is present throughout the rest of the challenge. Because of this, I recommend reviewing the information in this section and ensure that you are practicing the proper technique.

Your convergences also continue to improve, though there are still instances of lines pairing off, like box 119's yellow lines, box 172's purple lines, and box 222's yellow lines. 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.

All said, while everything else is in good order, the page containing boxes 186-190 appears to be missing. I'm going to request a revision to submit the missing boxes.