For the first 50, your lines are clean overall. However, I did see some arcing and wobbling thoughout the set. Your convergences also show good accuracy, with only a few lines veering off in the wrong direction, like in box 3 and box 26.

For the next 50, your lines show improvement. Some arcing is still present throughout the set, but wobbling is less dramatic overall. Your convergences also show improvement in accuracy, with few errant lines. I did see a few lines pair off and converge towards two vanishing points, like in box 56, box 76, and box 97, but they were not very frequent.

For the last 150, arcing is further reduced by the end of the set, demonstrating good improvement in technique and consistency. Your convergences also continue to improve. There are still instances of lines pairing off, like in box 113, box 190, and box 244. However, as before, these instances are not frequent enough to be a concern.

As an aside, some of your boxes are missing some line extensions, including: box 19, box 99, box 129, and box 203. Also, box 21 and box 29 have some lines extended in the wrong direction. It's not a major issue since it didn't happen too often. Just be sure to double-check that all lines are extended correctly going forward.

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