I made every conceivable error on this box. I managed to turn it into a usable piece by brute force and sandpaper. I'm a very long way from mastery of this craft!
One thing that worked well was the insert was so tight and well-waxed, it forms an air cushion and a natural soft-close. This made me happy.
I didn't film the build because I've found I get too flustered trying to document and learn a skill at the same time. Cheers to all the Youtubers who manage to juggle these two tasks!