My first attempt at a Gridfinity box for something that I couldn't find. The name on these cubes says Shashibo, but there may be other names for them. I used the generator here [https://gridfinitygenerator.com](https://gridfinitygenerator.com) and created a simple cube to subtract and it seems to have worked well. Feel free to improve in any way since this is the first model I've made.