For the drawer inserts that I posted about earlier. That’s “Cardboard Aided Design” 😀
This is how I started, as given the space available and the number of shapes and sizes to be accommodated, I had no idea whether what I was planning would really work. I even had these set up as a multi-layer insert with one tray resting on top of the other that I tried before this one. I really wasn’t happy with that.