I was still missing storage for pens. Since I also have the boat from my other project on my desk, I decided to add another one that can hold pens.
Take the file from the xTool page and load it into the program. Place the parts so that they are cut from a 3 mm thick piece of wood.
Glue the first parts together. I recommend starting with the base, one side panel and the back panel.
Add the top and also assemble the parts for the cabin.
Join all the parts together with glue.