Oh my!!! Isn't it so pretty? Chapter 3 where the papers that you had shine!
The thread and cover match so well. I think you'll be able to fill in the current disappointment when you make it.
And for the thick box, you don't have to wrap it around the hardboard, cut it to fit the size of the hardboard, and put it right on the bound kraft. As you did!
If you have any questions in the future, feel free to ask:)