A 3d printed Brick Keychain 

0,15-0,2 layers , file is presupported .

At first it fits a little rugh but it work out.

The V3 version in 3mf files has an additional bottomfix object. By changing the minimum dimensions, you can adjust the printer. We noticed in tests with the printer they have different dimensional deviations for the first layer, so I added a modifier.

Have fun !