Congrats on finishing the box challenge, good job overall!

Here are a few things I've noticed:

-When adding lineweight to the silhouette, you tend to slowly trace over the previous line; don't do this. When adding lineweight do it with a confident superimposed line, focusing on confidence over accuracy as always.

-Convergences have improved over the set, but I can see you still have trouble with the inner corner, which is perfectly normal. Here's an order on drawing boxes that helped me get it better.

Another thing that helps as well is to start thinking about the complete set of lines when adding a new one, instead of just thinking about lines in pairs. Here's a diagram that goes over it.

Overall like I said, pretty good job, I recommend looking into the advanced exercises once you get the inner corner well consistently.

Good luck with lesson 2!